Actually that's a nice idea, but do you know how much time that takes? You can't expect the moderator team to spit through every thread and every post as a volunteer. I don't know how things are with the other moderators but I do have a life you know.
But maybe we/you can throw this idea in the "New rules" thread and see what others think about it.
By the way, Mike wasn't reported by anyone the last 2 times (in 2 weeks time) he got a ban.
btw, that's oh so hard, as he posted much in threads that have admins and mods as regular posters in it. To eat a ban in those threads isn't a thing of impossibility when the mods team wants to have less work.