Just so you mods know... typically when you ban someone, you have the option to delete all their posts when doing so. You may want to PM webguy and ask him how he has it set up on this particular board. It would be a lot easier than looking for individual posts in an instance where they have made many.
Wildcat, would you mind putting this (the How-To) in the Mods section under tricks and tips. I did this once and made the process a lot easier but I could not explain how to do it to rest of mods. Didn't use it enough. Very slick though.
Thanks!