I'm not sure that you could get away with jamming the 2.4GHz band. Wifi operates at 2.4GHz too, and I suspect that there'd be plenty of lawsuits if an airport decided to disable all 2.4GHz equipment within 10km (or whatever distance is appropriate).
I'm not sure but i think that most r/c transmitters operate on different bands than WiFi does, since they dont interfere with WiFi signal. What is called 2.4Ghz is a lot of frequancy band/channels. And the most popular commercial quadrocopter, the Phantom, operates on 5.8Ghz IIRC. Although 5.8Ghz is also used for some new generation of WiFi i think it can be sacrificed.
Also on the level of rumours, i have spoken once to a son of an oligarch on a r/c models festival, who is himself into r/c flying and is a famous 3D heli pilot in Russia, and he said that in Kremlin and in oligarch's countryside residencies there are devices akin to military countermeasure jammers that will fry the electronics of a drone should it breach the airspace above them. I have nothing to prove those claims though and i am not even sure if it is possible from the physics standpoint. As i understand, the device should induce strong currents in any conducting materials through electromagnetic induction in the vicinity.