Jammers might work for a while, as long as they’re not used continuously (FCC will be on you), but with state of the art sensors and processors, a drone losing the signal from base would merely put it into fail safe mode to return to base via inertial navigation.
Don’t know if they’re that sophisticated yet, but they will. Heck, they’ll have them fully autonomous and programmable (commercially) if they aren’t already.
If you did that enough times hopefully the operator would realize that the drone is not welcome in certain parts. His craft is intact, and you aren't causing any damage.