Casper Warden just sent out a notice in Second Life for CasperTech vending systems support group stating he has globally banned 26 users from the CasperTech network, including all vendors and rental units. The users, all related in some way, were found to be selling stolen content on the marketplace.
I IM'd Casper but he must be buried in messages after announcing this since he hasn't replied. And of course, due to SL Terms of Service and the possibility of getting into legal do-do, he's not going to disclose any names.
I find it interesting that he's doing on a small scale what Linden Lab often won't do period.