I hate these people. They do this to me too but it's usually for a cig, money, and even ONE time recently, "Can I live with you? I have a college degree!"
It's gotten so annoying that I often think back to the empty streets of Indy with fondness...and I LOATHED that place in the end.
I indeed feel your pain. I can't IMAGINE how upsetting it would be if it was my ass they coveted! I seriously worry for you. I hope you've got some NASTY mace.