barky, i thought about your problem this weekend when i rode in an enduro in texas & we were maybe 20 feet from a bunch of cows at 1 point, who did not even look up.
we have a lot of experience with this kind of stuff in our little piece of the world also. i think that as katoomer said, a feud with the neighbor may not get you where you want to go. perhaps the best way to deal with this is to try to work it out with the guy. for example, our club has a hs track near a neighbor who moved there from the city & wants to think he lives in the wilderness. he wanted to prevent our events. we went & stood on his porch with him while an event was in progress & got him to admit that he couldn't even hear the bikes. finally he admitted that the real problem was that he didn't want more traffic going past his house on a public, paved road. we finally compromised with him such that we have only 2 "public" events there each year, which has worked out fine; he can pretend he lives off the edge of the earth (20 miles from a city with 700,000 or people), & we have all of the organized events there we care to have. we have another venue across the street from a guy who frankly CAN hear the bikes, & we got him calmed down in much the same way. most people will work with you if you treat them with respect in a non-confrontational way, trying to meet them in the middle. this guy may turn out to be the exception, but i think i'd start this way. don't tell the bar association i told you this, but going to court should be the absolute last resort.