You can always add him to your ignore list if he bothers you a lot:
http://forums.psychcentral.com/profi...?do=ignorelist

I tested it out: It shows when the user makes a post, but it doesn't show the message itself. The only downside is, if someone quotes the ignored user, then you'll see the quote.

Not perfect, but it's an option.

Also, you can do like MusicLover said and just talk to him. Usually I try to talk to someone in private first to see if we can resolve the issue.