Most of these beggars have extensive criminal records, which is why they are on the street begging. Why even get near them? When I see then on the street, I'm thinking of self-defense.
I recall once getting off I40 in New Mexico to recheck my directions. A bum came up to the car and tapped on the window pointing to his hand. I waived him off (I NEVER open my car up to anyone); he then banged a bit harder and repeated pointing to his hand. I said NO. He then began banging on my window with his fist. I pulled my trusty ole hog leg and pointed it at him...he got the message and left.
Moral of story: never open car to strangers and always have a gun when traveling.