How to deal with players that wants their characters to do automatic perception, stealth and searching for traps/secret doors?

Every time my players are exploring a dungeon, they want their characters to do perception checks for monsters, perception checks for traps and/or secret passages while being on stealth mode, all at the same time. If a monster comes or if they activate a trap, they get mad because “my character is always looking for traps”. If I say they need to declare their actions, the game goes like this:

[me describing a area, like a corridor they’re walking in]

player: I check for traps and secret doors in the wall, the floor and the ceiling. I also want to hear anything unusual and walk silently.

They want to be on “automatic mode”, expecting me to roll for their PCs every time they enter a new area. Otherwise they always have this phrase “I check for traps and secret doors in the wall, the floor…” that they say EVERYTIME I introduce a new area. I can’t put them in “automatic” for this kind of roll. We’re playing D&D 5e, but this happen in other campaigns, and it has always been a problem to me.

How do I deal with it?

Would a bat familiar have a passive perception of 16 in most cases?

In its stat block a bat is shown to have a passive perception of 11; the standard 10 plus wisdom. However, the bats ability Echolocation states that it "can’t use its blindsight while deafened", which heavily implies that the bat relies on hearing for detection. This married with its other ability Keen Hearing which says that a bat has "advantage on Wisdom (Perception) checks that rely on hearing" and the knowledge that advantage on perception checks also translates to a +5 to passive perception makes me think that barring special cases (such as perception checks that rely on detecting a certain smell), a bat should be treated as having a passive perception of 16.

Is this correct, or is there a reason a bats perception would stay at 11?

Perception While Sleeping

While a creature is asleep (naturally, not as a result of an enchantment spell), does it continue to use its unmodified Perception score, or is it disadvantaged as a result of it being effectively in darkness/heavily-obscured/blinded?

Or phrased another way, do the environmental effects darkness or heavy obscurement, or the blinded condition, apply while a creature is sleeping?

Can the alarm spell be detected by mundane means such as a normal perception check?

The alarm spell in the players handbook reads as follows:

You set an alarm against unwanted intrusion. Choose a door, a window, or an area within range that is no larger than a 20-foot cube. Until the spell ends, an alarm alerts you whenever a Tiny or larger creature touches or enters the warded area. When you cast the spell, you can designate creatures that won’t set off the alarm. You also choose whether the alarm is mental or audible. A mental alarm alerts you with a ping in your mind if you are within 1 mile of the warded area. This ping awakens you if you are sleeping. An audible alarm produces the sound of a hand bell for 10 seconds within 60 feet

Are there any examples in officially published modules or rulings, errata etc. that indicate whether the alarm spell is visible via a perception check vs the spells DC or whether the spell is invisible and must be detected through a spell such as detect magic or find traps?

Does Natural Explorer’s double proficiency apply to perception checks while keeping watch?

The Natural Explorer class feature is sort of vague about what skill checks count

When you make an Intelligence or Wisdom check related to your favored terrain, your proficiency bonus is doubled if you are using a skill that you’re proficient in.

I emphasized related to, because it doesn’t say "while in," so I’m wondering whether keeping watch in your favored terrain counts as related to your favored terrain. This could represent something like being more familiar with what’s naturally around, and so you have an easier time spotting what shouldn’t be — i.e. the approaching enemy.

Does it apply?

The 5e Inquisitive Subclass allows perception checks as a bonus action. Would that matter in a heavily obscured area during combat?

Let’s say an Inquisitive is in a fog cloud. By my understanding, advantage and disadvantage cancels out if you are fighting someone else in that cloud. But if you were able to make a bonus perception check (and succeed) before attacking, could that negate your disadvantage?

As far as I can tell, there are no direct rule applications but I just wondered if someone had any thoughts on it. I guess in my head, using your action to search for someone when you can’t see due to environmental conditions them isn’t that useful for attacking purposes. But if you were to use a bonus action (in effect searching and attacking near simultaneously) would that change anything?

Same question for attacking from outside said hazard. I search, find, and shoot arrow – negate disadvantage?

Passive Perception and Traps [duplicate]

My question is this: should passive or active perception be used for spotting traps? If you use passive, then the DM knows ahead of time whether or not a PC will spot a trap as no die roll is involved (eg. if the highest passive perception is 13, and the DM makes the spot trap DC 14, the PCs will not see it). I would like to avoid railroading PCs by knowing ahead of time which traps they will see and which they will or won’t see. Another problem with passive perception is that you have a 50% chance of getting lower than your passive perception every time you make an active perception check, so you are actually better off never looking for things, and just hoping you notice them.

In summary, when should I use passive perception and when should I use active perception?

As the DM, how do I handle enemy NPC Perception when the party approaches them without being stealthy?

I have a little question. My players are following a group of bandits, but the players are not hiding, they are even riding horses. They reach a beach where the 5 bandits are preparing a boat to retreat; 2 of the bandits are paying attention to see if someone comes, and the other 3 are just talking. My questions are:

  • The 3 Bandits talking use their passive perception to try to see the players, right?
  • The 2 Bandits that are paying attention roll for perception to see the players?
  • If my players doesn’t go in Hide, just riding the horses to the beach, whats the DC the bandits must roll?

Matrix Perception and Running Silent in Shadowrun 5e

Shadowrun 5e core rulebook states at page 235:

If you’re trying to find an icon that’s running silent (or if you’re running silent and someone’s looking for you), the first thing you need to do is have some idea that a hidden icon is out there. You can do this with a hit from Matrix Perception Test; asking if there are icons running silent in the vicinity (either in the same host or within 100 meters) can be a piece of information you learn with a hit. Once you know a silent running icon is in the vicinity, the next step is to actually find it. This is done through an Opposed Computer + Intuition [Data Processing] v. Logic + Sleaze Test. If you get more hits, you perceive the icon as normal; on a tie or more hits by the defender, it stays hidden and out of reach.

Note that if there are multiple silent running icons in the vicinity, you have to pick randomly which one you’re going to look at through the Opposed Test. Marks can’t run silent because they’re already pretty hidden, but all other Matrix objects can be switched to silent running by their owners.

At the same time – under Matrix Perception sidebar on page 235 it says:

When you take a Matrix Perception action, each hit can reveal one piece of information you ask of your gamemaster. Here’s a list of some of the things Matrix Perception can tell you. It’s not an exhaustive list, but it should give you a pretty good idea about how to use Matrix Perception: If you know at least one feature of an icon running silent, you can spot the icon (Running Silent, below). The marks on an icon, but not their owners

Now, questions. Imagine following situation – some decker, who had bought a hundred of RFID tags (1 nuyen each) and set them to running silent (or even stealth RFID tags, that are running silent by default (10 nuyen each)) and goes to perform some hacking. The target is protected by security decker.

Question 1. Security decker rolls his matrix perception to look for silent icons and gets at least one hit and finds out that there are running silent icons nearby. Does he get an exact number – there is 101 entity (100 silent RFID tags and one decker (who has, probably, more than one device, but they are likely to be panned and be represented as one icon) hiding nearby or just that there are hidden entities?

Question 2. Is there any way to focus on decker, not on RFID tags, when trying to reveal silent icons? I.e. does ‘persona’ counts as feature of icon?

Question 3. What counts as feature of icon?

Question 4. Decker used Hack on the Fly action feature and succesfully left a mark on device he is trying to hack. Security decker used Matrix Perception to check on device and scored one hit and can see decker’s mark. Can that mark be used to narrow search for that decker?

Does passive perception supersede active perception?

If a player makes an active perception check and it is lower than their passive perception, should we use the passive perception instead?

Background:
During our weekly game yesterday the party scout was actively searching for hidden monsters. He rolled poorly and ended up with a 7 on his perception check, seeing nothing. The claim was then made that since his Passive Perception was a 15, he would intuitively notice anything that he didn’t actively spot.