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Speaking as one of the people who advocated the page's destruction, your examples were terrible.
Most of your entries relied on the idea that people behaving like people is stupid. ...I mean, to be fair, yes, people behaving like people usually IS stupid. People do tend to be irrational and emotional and make dumb decisions. But that's not what What An Idiot is about.
What An Idiot is about contrived stupidity. It's not about a character behaving emotionally or making a bad decision, or not living up to others' expectations... it's about a character behaving in such an absurdly stupid way that it defies all possible logic and becomes a Plot Hole.
And, well, the examples you put just didn't fit that criteria.
EDIT: For full details, look down this page for the entry "What An Idiot.Undertale". The first poster should be Satoshi Bakura.
Edited by wrm5

The page was deleted on the grounds that examples were "shoe-horned in" but they weren't. I looked into the game and am obsessed with it, and there are multiple examples of the characters making stupid decisions when alternatives were present. There is even a case where one of the main characters lampshades a What An Idiot moment in the game itself. In addition, I find it disconcerting that the page was deleted without messaging me about the concerns of shoehorning. I would have liked to have a chance to defend my case and argue out the examples to see which ones were legitimate and which weren't. These actions were extremely rude and did not allow for healthy disagreements, which seem dictatorial. I know TV Tropes is a benevolent fan site and one that had previously given me positive experiences and feedback on such entries. I hope this issue can be addressed.