Okay, maybe this is more of a 'hot button' issue than any of us thought.
"Nobody in life gets exactly what they thought they were going to get, but if you work really hard, and you're kind, amazing things will happen. I'm telling you...amazing things will happen" --Conan O'Brien
In the off chance that it works, are you really ready to deal with the consequences? What're you gonna tell the others? You were just curious? "Oh, I just wanted to see what would happen. Now everyone's dead. Ya sorry about that. Sorry everyone! Sorry." You're going to sound like an idiot.
If you happen to survive the incident, you're not obligated to tell anyone you pushed the button. They most likely won't know what happened anyway.
Still, when reading Oberon comparing some of us to Stalin or Mao because of pushing a fake nipple, I almost fell off my chair laughing.
Eh... the button was hypothetical, therefore my response must be taken in context. If I really thought there were members of the group who were worse than Stalin, I wouldn't post about it... I'd be on my way to their house.
Incorrect, there is a very, very high probability of self-destruction. The button teleports 5,000,000,000 people to their deaths, but it does not, however, bias the deaths in the favor the one pushing it. It would be like playing Russian Roulette with 5 bullets and 6 people. Could you eliminate many rivals? Yes. Would you survive? Probably not.