Nope, because they alsop have one other resource available. They also keep tabs of IP addresses of the accounts that are logged in. They can always double-check login records and online activity against each other. If an exploiter sent something to a mule, and then logged off and logged back on with the mule account, it…
That is not entirely accurate. You had better believe that they can find out where you sent stuff from one account to another. Game servers do keep transaction logs of everything you characters does in game, at least financial wise. Otherwise, if you lost an item, and made a ticket over it, they could not verify if you had…