All I can offer is personal opinion and experience, so here that is. I love an organized game, teamwork, plan of action, execution, the whole deal. I'm always willing to follow what looks to be some semblance of a plan during games, but when the call to action is a comment like "HEY FUCKERS, GO LEFT YOU IDIOTS, OK NOW FOLLOW ME AND DO AS I SAY", it doesn't exactly inspire comradery and a desire to cooperate. I don't find being abrasive and dickish to be an effective leadership tactic, especially coming from people as random to me as I am to them. So like you mentioned, my first inclination at that point is to do the opposite of what is being demanded, or at least to not satisfy the prick.
Now on the other hand, if someone seems like a reasonable human being who has something of some value to say and presents it in a calm demeanor, befitting of the fact that we're playing a game here after all, then we're in business. Enthusiasm builds as now we have something to work towards, not just run out to the slaughter. Of course, there can be a discussion about having good ideas or bad ones, but that's not the point here. Usually if there is a plan, it's better than not, if for no other reason than it allows for more team mates to stick together for longer.