I can deal with Laugh Floor, Tough to be a Bug, Mickey's Philharmonic, Pixar Shorts, HoP, CoP, etc - because it's easy to hold back as the stampede enters so I can pick a seat. I find it essential to sit in the back for anything 3-D or I have trouble with the resolution of the images and I get sick.
What I don't like is when I get a FP for FOTLK - and I go to the VERY END of a row - can't fit anyone else on the end. And then - they ask you to move in the opposite direction - now trying to get me to move someplace else so a non-FP person entering very late into the theater gets a better seat than I do. This one makes me angry. I had a FP, you told me to sit any where I wanted, and now you want me to move? I typically just ignore them. At some point - I might get kicked out - and then I'll complain to a manager. But so far - the CM just tends to give up on my moving.