I don't need a ray gun. I'd be quite happy with just a lil ol' rocket launcher on the roof of my car, to be used at my discretion! (Oh, the damage that would be done...)

Guy like this parked in front of my house last night. He was meeting his girlfriend who live across the street. I stood at the window until he shut the car off, then he glanced up and saw me just before he got in said girlfriend's car and the drove off.

They got back a little after midnight. I didn't hear him leave, which is a good thing. So maybe she said something to him. If it happens again, I'll be the one saying something.

I used to live on the ninth (US, 8th UK) floor of an apartment building, snd slmost got shsken out of chsir or bed several times a day.

Yes, there is a noise law - but the requirements for proving a violation in court for an automobile (not building) are so difficult it is seldom (never?) enforced.

(In reality, I'm only hostile, not violent.)

If your were violent then you would have this setup.

Hmm. Considering that Trekkies have already built Blu-Ray phasers that actually set fires and pop balloons, you might be able to get one soon.
And although you're being funny here, this can be serious. How do you regulate a gun that fires no projectile?