Your right, you're not legally obliged to show some common courtesy. All i'm saying is that if you don't show me some courtesy outside of my home, then you will pay for it.
For all you people out there that complain that there something wrong with this country, this is it, lack of common courtesy.
davelee - Just through curiosity, the handwriting on the letter looks like it was either written by someone with a nervous disposition or an elderly person. I know i'm speculating here, but I dare say you wouldn't do the same outside a more capable (and possibly threatening) persons home.