Plot with Through[{f,g}[x]]… A bug or a misuse of Through[]?

I was expecting

Plot[{Sin[x], Cos[x]}, {x, -1, 1}, PlotLabels -> Automatic] 

and

Plot[Through[{Sin, Cos}[x]], {x, -1, 1}, PlotLabels -> Automatic] 

to give the same result, as

Through[{Sin, Cos}[x]] 

gives

{Sin[x], Cos[x]}

However I get this two different plots:

plot 1 plot 2

Is it a bug or do I misunderstand something? (maybe HoldAll Plot[] attribute does not mix well with Through[])

(I am running under Linux with MMA version 11.2.0 for Linux x86 (64-bit) (September 11, 2017))

How do living politicians protect their readily obtainable signatures from misuse?

Many living politicians’ signatures are found online or can handily be acquired (You can write them, and their letters will contain their signature). Thus do they use a different signature for personal private documents? If not, how can they guarantee that their signatures aren’t replicated without their consent?

I deliberately quote signatures of lesser-known politicians.

The Rt Hon. George Osborne MP

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The Honourable Rona Ambrose PC

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Elaine Chao

Some members of Congress

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