You could even go a step further and require the person requesting the unlock to provide photo ID and affirm that they are claiming to be the legitimate owner o

You could even go a step further and require the person requesting the unlock to provide photo ID and affirm that they are claiming to be the legitimate owner of the device to dissuade thieves from trying to use it and also for the unwitting receiver of stolen goods you now have a way to get that back to the real owner and potentially track down the thieves on the other side of the transaction. Sadly I doubt that would result in police actually taking action against thieves but a macbook is expensive enough to be felony theft in most places. The guy selling it on Craigslist probably isn't going to use a burner phone, meet away from his home, and use a rental car just to sell a stolen macbook. I think there are much better odds of identifying them if Apple would try and get devices past activation lock and track these cases down.