How do I remove a post in a thread I created?

I posted an ad for photography in the "business services for providers" forum... some women replied, and now some guy is using my ad thread to rag on a couple of the women for NOT using his services. I don't have anything against the guy, but MY ad should not be a platform for his complaints against these women.. How can I remove his post?

http://eccie.net/showthread.php?t=190887

Threads are rarely removed and there is not justification for it here. I do agree with you and the thread is closed at your request.

Torito