While I generally agree (I was making the point to him yesterday that I could easily beat and kill homeless people out of pure social contempt), keep in mind there are lots of different kinds. Most worthless.
The kind pbone was with were the crust punk kind, who suck for the reasons he described. Even GG Allin had a room. (Which reminds me, maybe I should come along if you ever meet these people again, Parker. I think that my tattoo may get me some perks with them, if you know what I mean).
Drunks are another kind. Junkies another. They are worthless for obvious reasons.
Fucking gypsies... True story, a friend of mine got married, and there was kind of a collection of money for them, not much, but y'know... and fucking Gypsies stole the money. True story. The Nazis were right about that one.
The only kind of homeless that I don't think are scum would be... refugees and the legitimately mentally ill.
Take into account here that I was briefly homeless... I fucking did something about it. I knuckled down and found a place and I made it work, while still finding the time to drink a quart of vodka a day!