Let's return the thread back to OP. How do you prevent spammers from linking their shady website here?

I was thinking by not allowing any new members to post any links in the gallery comments or image description or forums for... let's say... a month from the date they joined Renderosity? I think that'll reduce the amount of spam considerably... and perhaps have a bot notify them that SPAM is not allowed!

Their behavior is this: they sign up, they obtain the free membership and they get to "business" right away.... and they get banned, of course