Pete, your frustration is perfectly understandable. The actions of these individuals are appalling and clearly dangerous to themselves and others.
But let me say that I respect and applaud your willingness to go out and help them again, regardless of whether they seem deserving. This speaks eloquently of your professionalism and personal dedication. Bravo.
I can't say it any better. I really admire you guys, Pete. If ever there was an example of heroes, you're it!