Yah, I'm sure something like a rare one-use item couldn't hurt too much. Maybe it could be something with a really uncommon random event, like the planet swords used to be. P: Make it have a super ridiculously low chance of being found, and there you go. People can change their names if they're lucky or willing to throw a bunch of tu at the item's owner, but they're not really able to scramble to do it and make a huge confusing mess.