I suspect that an increasing number of countries and cities will move toward permanent drone bans, as battlefield technology inevitably filters down to organized crime—and eventually even petty crime.
Maybe this is the time for drone transponder signals? Require every drone handler to be registered, then have the drone broadcast some signal with the registration ID + some cryptographic hash?
Then shoot down everything that has no transponder or a blacklisted ID.
Yes, this will encourage ID theft (or just theft of the entire drone), but even then, a stolen ID could at least be a starting point for an investigation.
After the deaths of most of the veterans who were traumatized by drones?
Of course it makes sense if you see them as "disposable material".