Homeless love

so I volunteer at a shelter. Once a week. Been doing it for about 2 years. Usually see the same old people, or new ones. So I understand the system. Anyways, sometimes we get......college students here to volunteer. So the other day Bethel College came here. 4 girls 1 guy. Doing it for school. I usually tell them some things about homelessness that they dont know about. So I was having a conversation, a homeless guy, pretty young, was talking to one of the girls, but wanted to talk .....one on one. So I let them. Most of the girls are either 18-20.. So 10 min later, girl comes back. Saying that the guy trying to hook up with her, flirting, etc. I usually dont mind, but.........lots of people dont realize that......ANYONE can be homeless with ALL TYPES OF BACKGROUNDS. This would include.................rapists,sex offenders, and convicts. So I thought it was cute, but I did kinda warn her about her safety. But I didn't want to scare her by telling that kinda stuff. The college kids usually come every week. But if he really starts to get aggressive......THEN I AM GOING TO KICK HIS ASS. So what if he is homeless.