Good Work Gizmo
May be an idea on the random detection to put them in a sleepers list to manually or automatically be dealt with.
We work hard to get new members, and its so easy to loose a member because the software got it wrong.
Members don't see the behind the scenes work to keep the forums clean.
I have to say the Stop Forum Spam, has made it easier to spot a foreign spammer, but you will always have the local prat.