Spam on the blog!

Apparently my blog, and maybe others too, got spam posted as comments. I'm still astonished...!
And obviously someone is making money out of it...
Now I think all people hate spam's. Does that help? Not much!
My guess is it would be more efficent if that "hate" would be redirected to the product advertised.
The fight should be taken up to the commercial vendors, so they don't pay for this anymore.