Yes, a few times. A neighborhood mom once unwittingly picked me up after some kids in the projects were throwing stones at me. Another time, a kid from the same project came into our neighborhood and started trouble with me. The neighborhood kids attacked him. Can't say it happened every time, but it did happen a few times and I was lucky. For the most part, other people don't get involved and I can't say I blame them. I think my biggest fear was it was going to happen when a friend was with me and they would get hurt too. For that reason, I went out by myself a lot.
You know, 80% of kids never get into a fight, on the other hand, if you are handicapped there is a 65% chance someone will target you violently in some way, at some point in your life. You have a better chance of winning at blackjack in a casino than going through life without some violent incident, sadly.