My quick observations: When Dylan got a lot of publicity she also got a handful of the worst threatening and explicit comments. We just deleted them and went on with life. Once the publicity stopped, so did the comments.
As a man, I've never had threatening comments on my blog. I did however get a few gross/nasty comments on the video where I got naked and in the comments on digg where one video made it to the front page. So in my little experience it seems to be somewhat a function of popularity. Also it seems much worse for women rather than men. - Verdi
