Brian, as you probably know, IPs are irrelevant. They can be manipulated. Or the cheaters may exchange purchases, you may call it money laundering. If the IP doesn't match, it doesn't mean it's not cheating.
Hard evidence comes from the M.O. they all seem to use: buy cheap, sell at ridiculously high prices.
Tell me about Sherman Attenberry. 4/10/3 @ 18 yo. You sold him for 1.2 mil, he resold him, a month and a half later, for 9.1 mil. Is that a fair market price? No. Is it cheating? Most definitely! Why? Because he has way too many such transfers for it to be an accident.
He is a cheater. Period.
Now, please delete that post, it's ridiculous. Some might find it offensive. I do.