I have seen no improvement since Jimbo's warning and I think it is now to kick Michael off the island (in fact, his response to Jimbo's message was to blank his talk page). He does edit each day with a different IP but we have learned with 142.177 that simply reverting everything he posts soon after posting it (SoftSecurity) should do the job (an IP block would be nearly useless here since he edits in the 64.175.xxx.xxx range)
I could fix up the IP blocking code to include an expiry date fairly quickly, would that help? You would have to block a few times but it would probably scare him off.
Regards,
Erik