And what do you do if you have AA and guy goes all in before your act?
Of course, you call. Villain shows KsJs and win with a runner-runner flush. I know, it can happen but very frustrating if anyone goes all in (maybe because he's bored of it all), you call its all-in with AA (it is the best decision, if not with AA then with what hand) and your tourney ends. You still want to play the game and you can't because of this amazing party.