While I am not certain, I don't think so. Unless someone who is an offender has a static IP and no access to another computer an "entire ip ban" would entail banning every user of an isp wherein you are issued a dynamic ip every time you log in. That would prove detrimental to the trading post. Then there is the question of proxy servers. There is really too much to consider when dealing with online transactions. If we need to lock down the trading post because of abuses, then only a ftf transfer with a 3rd party witness would suffice. Perhaps an FTF day at a Site shoot? I don't know what is the solution right now. Is setting up a group COAR15 Trading post day where transactions can be held and some shooting done be too unreasonable? Once a month for now with other members present? Just spit balling here.