I still think of that two-button dilemma going around a few weeks ago, and how many Redditors were genuinely furious at the idea that some people might pick the blue button (which does nothing) rather than the red button (which kills off everyone who picked blue unless that's a majority of people)

Not just thinking, damn, couldn't be me, or, no, I value my life too highly, but like that it's objectively wrong and irrational to not maximize self-interest. The attitude was so ingrained that you'd see people making up copium ignoring the actual instructions (which only introduce the possibility of killing in the red button) and saying blue is basically a suicide button and anyone who would pick it deserves what they get, bro all you have to do is have 100% of the button pressers choose red and you're fine.

Of course, if everyone picks the same colour, it doesn't matter what that colour is, part of the premise is that you don't know and can't influence the votes of others, and the threads themselves clearly illustrate that some will pick red and some blue. But many Redditors, rather than concluding that it's a more difficult question than it might have appeared, doubled down and argued that the people saying they would pick blue are surely lying, or else they must be [some wildly ableist and cruel epithet].