We had a difficult neighbour situation, neighbour parking soooo close to our brand-new car (albeit on a public highway) that ended in a slanging match. Neighbour then complained about our CCTV after which we received a letter from the Information Commission about where it should be situated and notices in windows etc (we were already compliant). Our vehicles often had phlegm over them and we had flat tyres from screws often.
Anyway we moved nearly 2 years ago. Not because of this issue but that was a bonus.
Our firm just took on a new worker. Guess who it was? Neighbour!
I am their Line Manager. I am remaining professional.....