In order to keep spammers at bay, I am instituting a policy that keeps the membership to current and active members only. Any user that has never posted to the forum and has been inactive for over 3 months, meaning they have never accessed the forum by logging in, will be deleted. Spammers will register and put hyperlinks to websites in their user profile. Rather than spend an enormous amount of time trying to keep this from happening in the first place, a periodic deletion of inactive users will achieve the same result with little time involved.
If you're not a spammer and you're sitting on the sidelines never using your account, you may find your account deleted. Just a heads up.