At other SMF forums that I admin, we use the Stop Forum Spam add-on. The only problem it hasn't solved is the recent influx of signature spammers.
There are a few with admin priviledges, all are Avast staff, there are some anti-spam tools, but not StopForumSpam, which I think is a bit of a pity as it is a great resource and catches many (manual checking suspects) that aren't blocked by the other measures.
Now you have your 20 and can access the full profile settings.