So you're really just full on board with the Ebenezer Scrooge "if they would rather die, then let them get on with it!" school of thought, then, huh?
It's been a while since I had to break out the I Don't Know How To Tell You You Should Care About Other People; most people at least pretend that they're not absolute moral voids.
You should care about other people, I think: the people who live in American cities and being harassed by homeless. Nobody is above the law, being on drugs or mentally ill is not an excuse. And if you cared about the homeless, you'd understand than continuing with shielding them from the law is not going to end with the people saying "Fuck the laws and the Constitution, let them be themselves!".
It's been a while since I had to break out the I Don't Know How To Tell You You Should Care About Other People; most people at least pretend that they're not absolute moral voids.