There is only one way to reach the mindset of a person like that and that is to install your own cameras on your property and face all of them at his house. Any

There is only one way to reach the mindset of a person like that and that is to install your own cameras on your property and face all of them at his house. Any of them that you can face directly into his windows the better. This may get negative attention here on HN but sometimes a pissing contest is the only way to get through to someone. You already tried the nice approach.