Yeah, or get them both stolen.

I caught 2 guys trespassing on part of my hunting land last night and I about choked them to death. Normally I'm don't get so worked up over things like this, but they've been trespassing for YEARS where they don't belong and last night I was finally able to catch them in the act. At this point they were both lucky that I didn't bury them in a swamp somewhere. [:@]

However in your case, it sounds like the best course of action is to talk with the neighbors first and try to solve things through diplomacy. If that doesn't work, then do what G W Bush would do.