Serious question, who here actually tries to create such paranoia in their players? It's probably one of the biggest reoccurring memes around here and I don't entirely get it.
Is this the tone some people are actually trying to create and if so, why?
It could just be I have a very narrow group of people I've played with, but this doesn't necessarily seem a tone I'd be striving for.
my personal rule is to only lay a trap that has clear potential to be discovered in-game, with a context clue, and not an ambiguous "roll for perception" out of nowhere.
randomly dropping an anvil on a player is a dick move.
telling players they're walking through an active construction site of a new smithing conglomerate, with an unfinished forge 10 meters above them, at least sets the tone and let's them know caution is a reasonable option.
also sets up some weird intrigue that could easily turn into a sidequest.
Generally, such paranoia is only for a single adventure (I had a haunted mansion my friend did where that paranoia was well done), or a one-off scare/surprise we can all have a good laugh about later.
I had a sort of opposite problem the last time I ran a campaign. my players came into the game super paranoid, probably from reading stories about tricky DMs, and it made my life pretty difficult.
I did set up traps and misdirection, but only when there were exactly enough clues to figure it out. I learned that the major problem with that method, is that what's obviously a clue to me wasn't always obvious for them. so, I was thought of as a tricky DM. then, after I softened up, my sessions looked too easy and obvious.
honestly, it's just a really difficult balance. I eventually got it to a good place for everyone, but everyone really does have a preferred level of deceit, and it isn't easy to cater to a group of 5 with varying levels of expectation
(To be fair it was specifically the lack of garden gnomes that was a significant plot point in said tale, but characters in a setting being aware of a lack of garden gnomes sort of implies that garden gnomes do exist in said setting... but, again, given Old Man Henderson's nature they could have easily just ever have existed in his head...)