This may be an odd question, but have you ever took a microwave maser out and used it for anything?
A friend of mine once told me he wants to take one and attach it to the front of his car to "punish" people who cut him off. After turning my lunch to near plasma, I don't think I would want a microwave maser point at me.
Maybe a red light camera "de-activator" is in the midst.
Cabe
update:
MASER stands for "Microwave Amplification by Stimulated Emission of Radiation."