I have shit head neighbours too. I went from the best neighbours in the world to the worst trailer trash you could imagine (the good ones moved to another town). When they started their B.S. with me I called the police. They got the message loud and clear that I was not to be triffled with. They haven't bothered me in almost 2 years. We don't talk to each other and we both keep to our sides of our property. If you need proof, you can pick up a surveillance system pretty cheap nowadays and record the evidence for the police.

It's great when you can be friendly with your neighbours, but some people are impossible and disrespectful of others. When that happens, I think it is best to be firm and say fuck it to the good neighbour policy. Thankfully I have three great neighbours on the other side of me who I get along with really well.