Not jammers or missiles but transponders.
I am a hobby flyer but these idiots put my activities at risk.
I would suggest that any drone capable of flying at 500ft or more must carry identifying id on board electronically embedded on the control electronics in the event that it crashes. But it should also have an onboard transponder so that it can be identified in the air. Any drone operator flying in a negligent manner is liable to severe penalties but it is far too easy for the operator to escape without discovery at the moment.