Blogs and Libel

Sense about Science has a guide for bloggers who face legal threats here.  I had an issue of this sort with Atiq Malik, although I don't believe his threat of legal action was a serious one.  When I started this blog I also had a problem with a number of comments posted anonymously carrying what I took to be libelous or sometimes just nasty remarks about individuals.  Although they claimed to be from several different authors, I suspect they were actually posted by two rather sad individuals.  Happily, both of them have ceased to post, but that is the reason that I always moderate the comments rather than allow instant publication.