I feel your pain. As the very visible head of one of the country's largest gatherings of fans this past year, and as someone who's been involved in online fandom for about 15 years in various forms, I've seen some truly atrocious and hateful things written about me. It can be hard to stand there and take such abuse, and you sure shouldn't *have* to. But people with no life always have more time to spend being jerks than people with a life of their own. And jealousy, especially in fandom, can be a powerful motivator for those no-lifers.

My advice is this: take reasonable steps like you are doing (no anonymous comments by default), let people know that you're on to the troll, and don't let it get to you. If it gets any more serious than anonymous comments, report the offender to his ISP.

For what it's worth, just talking with you when Neil was at Balticon was very enjoyable. Nobody who's met you (even briefly) would believe the bullshit anyway.