To be clear, when a vendor is banned for scamming, they are allowed to start over with a new account. SR won't ban the person just because they scammed with their initial vendor account. So, yes, Liston was banned for keeping customer info and threatening to set a customer up to be busted by DEA, and that account was shut down. If he's back, there's nothing SR will do about it as long as he follows the rules this time.