BSG (Finally a non political blog post)
Here are actual humans attending a Battlestar Galactica convention, dressed up as Battlestar Galactica characters.
I love this show, but I am happy to report I have not delved to the level of NerdCon 5.
For disclosure purposes, I have attended a Star Trek convention but I was very young and very impressionable. (I did not dress up, for those who are waiting to jump at the opportunity to ask). (Although I think it would be fun to go Borg. Klingon is sooo five minutes ago).