I am shocked and horrified. By this post outlining sexually explicit death threats levelled against Kathy Sierra. This behaviour is outrageous and should not be tolerated. Kathy is a wonderful person, an excellent speaker and a giving member of the tech community. She has my full support. My thoughts and best wishes go out to her as she copes with her current situation.
Let's not let it happen again. If you notice such unruly behaviour forming in your own blog/forum/community - head it off. Inform the person that this behaviour is not appropriate. If that doesn't work - then do something more drastic (ban them from the site and call the police).