That's an oversimplification. If guns are 100% illegal in all circumstances, then anyone with a gun is by definition a criminal and can be engaged accordingly. That makes things vastly simpler from a defensive/law enforcement perspective. It would absolutely, positively reduce the number of mass murders, gang killings, and other firearms associated fatalities. Those numbers are very obviously shown in countries that have outright bans on firearms. 
 
	 
 
	I'm completely against that position, but trying to boil it down to "the bad guys will have it anyways" is excessively simplistic.
 
	 
 
	This applies even more so to drones. It is simply easier to do something illegal with a tool that is legal than it is to do with an illegal tool. If we go so far as to say that civilian drone ownership is illegal, then the ROE for drones gets very simple very fast. See it, shoot it.
 
	 
 
	I'm against making guns illegal because I believe in the core premise of the second amendment. The risk of government-induced tyranny is far worse than the loss of life associated with the legalization of firearms. I do not believe that premise extends to drones. 
 
	 
 
	I'm also not advocating for making drones illegal (haven't given it enough thought), but it's a hyper-libertarian argument to say that "bad guys will have it anyways" and almost every hyper-libertarian argument collapses upon contact with reality.