A system that depends on human honor and ethics in order to be successful has very little solid basis, you people all know this as well.

Bitcoin makes the law irrelevant in this case as
A) Bitcoin, and claims to ownership of Bitcoin, are not something courts are concerned about.
B) The irreversible nature and the way the blockchain verifies transactions mean that the new owner of the coins is, in fact, the actual owner now.

If you are concerned about honor, ethics, and law, maybe you should not be dealing in Bitcoin, at least until the law recognises them or you can accept that expecting someone to have "honor" only means you will get burned.

Sorry if it sounds "fuck you, got mine", but this is literally FYGM technology