Gosh and thought I was mean as a kid, since I used to wake up moths.
I'm all for arming all the "bums" with paintball guns and telling them next time you're due to come through.
Those people have lost their jobs, family, life, everything. They have health, mental, and morale problems bigtime. They're often obnoxious, but mostly they just need help - and a decent night's or day's sleep, apparently that's a big problem for the homeless, just finding a place they can sleep without being harassed.