Remembrance - S1-E1
Stupidity: In this episode wily old battle genius Jean-Luc Picard and amazingly smart human-android Dahj act exactly by the definition of stupidity of this website ("something daft, like running upstairs with a killer behind them, instead of out of the front door"), and even surpass it, because the killers are not even chasing them yet. And why not? Because they are in a public area with a ton of people in the middle of what is basically the capital of the world; no band of kidnappers would attack at that point, or at least, it's way more unlikely. But from there, our nearly centenarian hero (steps away from official government buildings and in a world with communicators, teleports etc.) goes up a ramp of stairs leading to a desert rooftop with no exit and no witnesses, exactly where a group of evildoers would attack - and are even able to cover their tracks up exactly because of this choice. (00:31:50)
Suggested correction: Picard is being led by the extremely combat-effective android. She has previously fought off these attackers with ease, and had succeeded again. It was only the exploding rifle that stopped her escaping. Picard and Dahj would rather lure attackers away from a populated area in order to protect bystanders, since the attackers were coming either way.
The slowly-exploding rifle somehow unavoidable for the super-fast android that dies from the barf that a middle-aged caretaker shrugs off would deserve a stupidity entry of its own, but back to the point: if the attackers came their way, they would have never been able to erase their traces by deleting footage, and therefore they would have been the 'stupid' ones. This is pure movie logic and plot convenience, just like the designated victim in a slasher running upstairs rather than screaming bloody murder in the street where they can be helped or dissuade the killer from getting into unfavourable situations.