First of all let me preface this by saying that I love comics. A lot of people discount comics as being a childish medium; however, I feel they are wrong. When you have a good writer telling the story with words, a good artist (or art team) telling the sotry with pictures, a good colorist to set the tone and they all mesh together as a team, it is an amazing form of art.
With that said, I've been to a couple of conventions. There are already a lot of freaks and idiots there. I'm sure the organizers don't want additional freaks and idiots running around with press privileges.