Due to an ongoing problem with spam, we have enacted certain restrictions for new members. As a new member, you will be restricted from creating new threads/topics, and unable to use BBCode in your posts.
If possible, put a flag of the fledgling's post, if it has links in too many of those first 10 posts. That way you get a warning to check and see if they are spammers.
meaning, let them post links, or have the system report back how many links the given new member may have posted, in those first 10 posts.
A spammer is going to have links in every single one of those posts. Which is, of course, a dead giveaway.
something along those lines, if at all possible. You might have to create or find a reporting routine for the given BB software in use.