if the service along with the account were sold?
Lock the service thread with the last post pointing to a new thread started by a new copper account. Clean, transparent, no room for misinterpretation.
I can't think of a trust-inspiring reason for selling or buying an account. And before someone starts screaming about nutildah again - yes, that was not a trust-inspiring action. I'd still trust him 10x over any of you screamers. Sometimes the way people deal with controversies is more telling than someone's squeaky-clean virtual persona.
Theymos has refused to ban the activity, probably in part due to his Anarcho-Capitalist tendencies (I speculate.)
Probably about as much to do with practical impossibility to enforce such a ban (short of KYC) as any anarcho-ideals.