I think it's really annoying when people can't accept what other people are doing and try to push them down by using a combination of whining/scolding/I-Am-Better-Than-You looks.

Maybe I'm being sensitive, but really some people have to know when to stop minding other people's business and to get off their high horses. Also to stop whining whenever things don't go their way. You think you have a better way, you voice it, if people don't agree and give you a valid reason then shut up already.

And if the group's made a mistake and you've done nothing to stop it AND you're in charge, you're at fault too, so giving this tired old "Not Again" look like everyone else did wrong and you're the only one who's right simply because you didn't make the mistake will just piss people off. I always thought being a leader was more than just doing the right thing, it's leading people in the right direction and if they make mistakes due to your negligence, you whack yourself in the butt instead of acting smug about things.