Man what an f'ed up neighbor.....Good thing is that when this is all over, they will have to leave due to all the negative publicity. I'd be sure theor name was well-known all over.
I had a similar neighbor when I lived in a townhouse complex years ago. She was a renter and neighborhood busy body on welfare to boot and with about 3 or 4 kids running around at all hours. She decided that because I rode a motorcycle and parked it in front of my car covered, that I was in violation of the HOA and had an inoperative vehicle. The HOA flunkies came out without even lifting the cover to see the current plates, and proceeded to use a large safety pin to attach their notice to my very expensive new cover.
Furious, I delivered the new cover, with note attached to the HOA president's desk personally, along with the current registration, receipt for the cover and vehicle in question parked right out front of the office. I then explained that the next door neighbor who had complained also seemed to have an inoperative vehicle in her parking space (I removed her license plates and trashed them the previous evening in an after-dark mission) and that they should attend to that immediately after writing me a check for my new cover they ruined, or I'd be calling the law.
In less than an hour, the check was written and an HOA rep was looking at the vehicle in violation next door to me.
I never had anymore problems from that neighbor again.