I am actually someone who has been turned off from seeing Serenity due to the extreme fans. I had no problem at all with people squeeing about it on my flist - like you said, I could just scroll on by, and everyone's entitled to squee - but the campaigns to drive up ticket sales, the insinuation that I was somehow less of a person for not being interested in it, the spam attacks...those were over the top and annoying.
no subject
Count me as another turned-off person.