There's been quite a bit of confusion around whether or not an iCloud unlock is legal or not, so we'll attempt to clarify to the best of our ability. The question of legality here is highly nuanced. If an iPhone is stolen or reported lost by the owner and someone else is subsequently requesting an iCloud unlock, the circumstantial evidence would suggest that the phone is stolen. However, just because an iCloud activation lock has been enabled on an iDevice using the Find My iPhone feature and the user wants it unlocked, it doesn't automatically mean the device is stolen. There's a big difference.