I have turned off the abiility to post comments, because I've had a number of cases now where someone has posted SPAM-like and/or offensive material to one of the weblogs I host. I'm not willing have people come to my site and find junk like that.

This makes me sad, because I've enjoyed the few comments I have had on the blog, and I think the feedback aspect makes it more interesting, but alas the few have spoiled it for the many.