[alistairSH]

The vast majority of these homeless are mentally ill, drug addicts, or both.

Citation? That's a much repeated trope, but I've yet to see actual numbers to support it.

[gamblor956]

Walk down LA's Skid Row and count the number of homeless people you see who aren't (a) on drugs or drunk, or (b) mentally ill.

Thousands of homeless live on or travel to Skid Row each day, but most people who attempt this challenge don't get to double digits.