Early on in a tournament it is annoying, but lets be honest, if it is a free-roll they are not losing anything, I have called early all-in pushes from players with A/A or K/K and still lost, but it is the risk I am willing to take, and if the Poker Gods are smiling on my opponent, It's goodnight from me.
I have been victim and the Victor in some of these all-in idiot shoot outs, but again Free-rolls don't cost you anything, I have even come across them in low stake buy-in games anything from a 10 cent MTTs to $1.50 SnGs some even higher, but if you are not calling them with premium hands when do you call?
I once played a 10 cent SnG and was dealt pocket 10s first hand, when a player on the button shoved all-in, I expected him to have a big pocket pair like Aces or Kings, but I really didn't want to play against such an aggressive player, so I called expecting to go out, first hand and I could find a softer game, after all I just wanted to play Poker not Bingo! Low and behold he had 7/2 off and I was shocked, I know luck has the upper hand in a all-in situation but 7/2 off, he must have been smoking some weird S***.
But then again 10 Cents isn't that much to some players, and when it all comes down to it, any amount of money is only important to each individual player. It is all relative to what you can afford to lose, Playing low stakes for me is just for fun, I don't want to win mega Bucks playing Poker, I just want to have a little fun, and enjoy the game.
When the fun Stops, STOP!
(or go all-in)