Say youre against 1 guy who show you aces and pushes.

You are calling $150 to win $150 + $600

5:1 odds is good enough to call with any 2.

I think it might become a fold if you hold something reallllly bad like 72o and lots of people push in but I dont have pokerstove on this computer so its hard to check that out. I doubt you can ever have a hand so bad that calling would be more than a tiny mistake and more often than not folding is a huge mistake.

Usually you arent going to be much worse than 2:1. 4:1 is about as bad as you can get (Overpair).