I think the best devs could do is let the ID of the mons, that we see on the chat, publicy visible and trackable. When someone steals, instead of giving to the person the money that the other selled the mon for, they track down the mon via it's IP, take it away from the person who bought it and return to the owner, and give 100% refund to the buyer. Obviously the person who buyed would be informed like: "Hey, one of the mons you bought recently was stolen, so we took it away and gave it back to the owner. But to not let you on red, we're refunding the value spend on that mon"