Unlike drones, the average RC car doesn't carry a risk of killing/maiming people when they drop out of the air at near-terminal velocity. If a bus hits your RC car, at worst it gets a scratch or dent before the RC car is destroyed. Even a tiny drone, on the other hand, could easily take out a prop or turbine on an aircraft and lead to the death of the occupants or bystanders.
I don't get how people in this thread are failing to see that this is reactive, and pulling out ridiculous examples as equivalencies. Guess what? If people driving RC cars started causing problems like drones are, those would be regulated too. "Well next they'll require a license for RC cars, or lawn mowers!" Well... yeah, they will, if enough people cause serious-enough problems in public with those.
Get one of the two major political parties to adopt protecting the right to fly drones as an unquestionable and heavily-promoted plank of their platform, then throw many millions of dollars behind interest groups supporting that message and activity, and the same thing will happen there. Oh, and maybe get an amendment passed about it.