spam - Private message

[b3d +]

My site is fairly new and already users are getting spammed. I do have captcha turned on. The spam is gibberish and I don't know the point of it. Seemessage field below.

6XcEII rpvoiqtsdvoe, npdsiollawvi, [link=http://bulvshznrkdk.com/]bulvshznrkdk[/link], http://nyklarbzpixi.com/

I tried using javascript to block http being in message but I assume spammers have javascript turned off.

I really didn't want to use private message but I guess I will have to unless someone can help me to block certain text in message server side using php in contact.php.


ps... With pm being used do I have to edit user group to turn off form because right now it is still showing?
When I am logged in as admin there is no contact form but when I log out there is link for pm and also contact form which doesn't make sense.