httpwebwitch - 3:04 pm on Jul 7, 2010 (gmt 0)
I would follow up with a blog post outlining this farce!
I like that idea, too. Publishing C&D threats is prime blog material. Publishing the C&D might make your site rank even higher for their keyword, and makes them look even worse as a pleasant side-effect. Do some strong interlinking between the C&D and the original post.
If you wanna be nasty. LOL