You can make admirable choices that also put you in danger, that's entirely valid, but that is making a deliberate choice. Routinely making poor choices however will put you into dangerous situations whether you intended to or not. Again just to be clear, I think doing humanitarian work like working with the homeless is absolutely a fantastic way to give back to your community and is in no way a poor choice.

All that said, I'm not certain I believe you. My mother did a lot of work with the homeless too, as part of a meal program run by her church. As she did that, I used to spend evenings at the church several times a week. All that is to say, I know that community fairly well, I know the kind of people who helped out there. I know they were all kind, forgiving, understanding people. They understood that people can end up needing their service for all kinds of reasons. You on the other hand, came out swinging, ready for an argument. You called me a coward without really having any idea what kind of person I am. It didn't strike me as "kind" or "understanding".

To sum up: "dude, chill"

How about getting defensive over what someone is doing in their own life?

They dont know you. They were sharing their own expierence.