This thread is a funny read after a boring day.
Love it when the keyboard warriors come out, 99% of the people on here telling you to clock him one or burn his shed down wouldn't have the balls to do it themselves, I bet they're all sitting there in their bib lycra shorts tending to their comb overs.
Anyway, I was going to write a bunch of stuff here about what I think you should do but no one has picked up on the fact that all this stuff (calls to council and police, ripping up of plants, dumping of rocks, building of a fence etc.) has supposed to have all happened in the last 11 hours?! Fishy
If this does happen to be a true but quite frankly unbelievable story then in short you need to make sure you KNOW you are right and then make him look like a fool. Report to the press, get his face in the paper. Start a blog on the internet telling it as an entertaining story with photo evidence. Play with him without breaking any rules, sounds like a good crack.