see i think that the performer isnt obligated to sign or anything but it is in his or her best interest to seem nice, unless they are uber talented, but there are some cases where it is inexcusable, for example I am OBSESSED with Fame on 42nd street, or was, and I saw it 17 times I was REALLY obsessed, and I would go every 2 weeks when i;d saved up enough babysitting money, and i LOVED sara schmidt, who was serena, and every time i went i would hang and talk to the cast after each performance, except there was one cast member who was routinely rude, and i would try to compliment her and she would just walk away and she was by no means in a rush and it wasnt like there were a bunch of fans, it was usually just me, and the last 2 times i saw it, the 2 days before i left for my summer camp, 4 days before it closed, and both times i was crying and all the cast was comforting me and we were talking and stuff and she just walked on, but the 2nd to last time i saw it it was sara schmidt's bday so i brought her this really nice expensive cake, and i brought another cake for someone whose bday it was on closing night which was 3 days away and everyone was thanking me, but she and the person whose cake it was just left without thanking me, and the last time i ever saw it i asked them to sign a poster and he did and was like oh thanx for the cake and all the cast was thanking me for how nice i'd been for the run and she didnt say anything just like scrtibbled something and walked on and dragged the guy who was talking to me, um, RUDE
"Don't thank your parents, if you were raised in a nurturing environment you wouldnt be in show business"--Conan O'Brien at the 2006 Emmy Awards