Can a random passerby enter a Rope Trick or Psychoportive Shelter?


Both effects have similar natures, end results, and wording. However, nothing in the wording of either power or spell seems to indicate that someone can’t come in wherever, assuming that they can reach the interface, pass through the plane of the interface, and assuming there is room for one more.

Area of effects and other special effects cannot cross the interface, as described, and the interface is one way visually (even when invisible), but the entrance of another creature after the fact does not seem to be contradicted?

Thus, can a random passerby enter a Rope Trick or Psychoportive Shelter, accidentally, or on purpose?