With the previous forum software, this wasn't an issue because the search engine crawl bots didn't check profile pages because a person had to be logged in to view them - I'm assuming that isn't an option for web wiz?
I kind of liked when users could post links at their first post, because it made it real easy to tell who the spammers were and keep the forum clean. If they can't post links, and they post anyway, then there's no way to tell they're spammers and people end up pointlessly responding to them.