This reminds me of something that happened in the winter of 1974. My blood pressure still goes up when I remember it.
I was clearing lots in a housing development. Lady next door came out and stopped me from working, asking questions. She tells me if so much as a leaf falls in her yard, she's going to sue me. Then she asks about this particular tree and I told her I was going to have to take it down....oh, she went ballistic, threatened to sue, call the building inspector, etc.. The tree shaded her kitchen window in late afternoon and if she lost that shade she would sue. Nothing a building inspector could do back then because we didn't have one and there were no codes etc.. Well, I called the developer I was working for and he came out where I was working. We discussed the situation and I told him the tree had to go to make room for the house ...AND...get this...she was already using a few feet of his lot. The property iron would have been a few feet over in her drive if it existed. He tried to reason with the woman but she would have none of it. Her husband was big shot from up north that had just moved in here to run some fancy/pancy company yak, yak, yak. He told me to stop work and come back in the morning.
Next morning bright and early my man was there with a surveyor, a lawyer and the real estate man that sold him the lots. He tried to reason with the woman one more time. Offered to sell her a few feet of the lot at a reasonable price and change his house plans some. She was worse than ever, didn't need to buy any property, called her husband to come home and tell these bumpkins what is what. By the time husband got there things were heated. The property line had been established and the reasonable man I was working for was not being reasonable any more. The property iron was 3 feet over into their drive and their new addition to the house was also on his property. He told me to get on my bulldozer and get their "trash" off his lot....

Long story short....that 10 feet or so of property cost the hell out of them because they were so unreasonable. I've been caught up in some heated situations before then and since then but that one was about the worst.