content: ... and people only watch for and report 'bad actors' if there's compulsory registration.   I get what you're saying, and I don't particularly disagree, but I have to point out that this actually "worked," if you can call it that, for the ham radio crowd. Just try getting on there and acting a fool, especially without a call-sign, and you'll have your transmitter location reported to the FCC before you know what happened. It does engender a culture of exclusivity, and that culture religiously self-polices; I can easily imagine the same thing happening with drones.