I agree with you that TV and movie creators are much more fic friendly. After all, there are so many Star Trek series, Star Wars series, and Stargate series, what are they other than creator authorized fan fiction? I don't think I've ever come across a TV entity that was truly against fan fiction. Hell, if you go to ff.net, I believe the entire list of material you may not borrow from is a list of authors. I don't think there's a single television series on the list, but the guidelines access is down for maintenance, so I can't be sure.