I can sympathize with that somewhat, and would also stick up for the usher. Still, I'd prefer to watch a movie in uninterrupted peace. Why should I have to pay $8.00 to get in a shouting match with some rude idiot and to drag him outside to teach him some manners, when I have to do all of that for free at holiday family gatherings?
Well my theory is that they either won't come back or will modify their behavior. Word will get out that this will not be tolerated and people will behave. It works for kids. Have you ever noticed how when one gets in trouble the others start acting better?:')