Automated forum members

I have noticed lately that we have had some automated "members" joining our forums with a generic word and 3 numbers after their username. They also have an "online poker" link in their signature and as their personal website. There have been three occurrences of this, and I have deleted each and every one of them with much glee. These automated bots spam topics with generic posts such as "I have no idea what is going on? [:unsure:]". &br; &br;If you see a member has joined with a profile and a few posts that fit this criteria, notify me or The Chipmunk at once. Thanks for your time. ^_^