I always hated ushers. A little bit of power can go to your head. Why do we want this back? If someone is making too much noise let them know.
Because people can't behave.
It's not too much to ask for people to act appropriately in certain situations. During a movie, or stage production, it is not too much to ask for people to shut up and stay off their damned phones. If you can't be relatively quiet for a few hours, maybe going to a theater is not for you.
I think we've found the talker/cell-phone-using cinema-goer.
If someone is making too much noise let them know.
I suspect that you've not tried this more than once, or maybe not even at all.
More generally, I have approximately a 0% success rate getting people to change their bothersome behavior. Loud neighbors are far more common and know they're being loud and don't give a shit in every single experience I've ever had.
I'm not afraid of confrontation, I just don't see the point when it literally never works in my experience.
Makes you wonder why you _hate_ them...