As far as security methods go, that's a bit insane.And I'm sure having a username sitting in "Category 1" would be a major tip to LE. A lot more major that a breakdown of how many purchases you have made on SR as well as every message you have posted in the forums (readily accessible to any seller, and any person on the forums, repspectively).Also, I would obviously be asking my good buyers if they wanted to opt-in to the deals. As far as spam goes, I have only had 3 of these deals in the past 4-5 months.It would be equally important for me to set up another category where I can add buyer usenames in the "people you never let buy from you again, or in the first place". I lurk the forums often and add to my list of buyers from what other established sellers write. Currently it's a list on an encrypted flash drive, which I always check if an unknown buyer orders from me.