it is absolutely fair to tell them "being homeless and nuisance in the street is from now on illegal. either you want help to get back to society and then you will accept the help with its terms - you are really not in a position to make demands - or you can move to some unabomber cabin in the middle of nowhere, and there you can do whatever you want
This you?
That me. You can easily tell from my name above the text you quoted.