Probably your shocking personality, your electrifying
wit, and of course all those Anti-Kerry particles.
Occasionally I also get silent FReepmails (newbie accounts who don't post, only email). Some of these have been bulk mailings of venom.
I figure that some of them come here by random Google search (FR threads can be found there).
Someone else expressed surprise that the Swift Boat veterans ad didn't draw out more troll activity.