Hey Myzen,

Wow, some neighbor! Some experiences!

My suggestion, when ever I would see him out, or about to corner me, I would give a really quick wave, and keep right on moving, as if I had someplace to go, for important buisness.
Perhaps, a good example, Wow, You gotta get to your computer, to get on this site, and vent! Or anything to keep moving. If he tries to stop you, just say "Sorry, not now, reallly busy"! And say it like you mean it. Good time to start on your assertivness training!!
Good luck.

SongBird