Leslie AGD:
Yeah, I hate that.
I have a bad knee, from playing softball. (sprain, didn't take care of it, never healed.) So, when I sit for a long period of time, it's a bit of a strain. I make SURE to tell the managers, or ushers, when I go, because I HAVE to put my foot up on the seat. It never fails. The theatre can be totally empty, and someone HAS to sit in the seat directly in front of me, even when I tell them about my injury. I usually have to end up moving.
Grr. People can be so... people like.