Need help with Generic Viagra Spam how to stop this please

[MarkoBatelicic]

Hey guys, sorry if this is wrong section or place to ask but maybe someone can help me. My forum just got bombarded with viagra spam, what can you advice me please what tools can i get to stop it? [url=http://cheapsildenafildeals.com title=viagra]
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I was trying to google something about this but with no avail. Sorry to bother but really need some help with this.

[Paul]

So you spam our board with a fake posting, coyly sticking in the URL for the Viagra site? Nice. We see through your ruse and raise you one false URL.

Or do I have this wrong? I read every post and edit/delete so if you're looking for an answer, that's it. We also disable currently any URLs in posts, so that defeats the purpose of spamming our boards with URLs.

We try to keep these boards clean and useful but it's a full time job!