imho it comes from western states not simply rounding them up. in atlanta, before the peach bowl the cops would descend on downtown, arrest all the homeless, bus them up to cherokee, and then the time it took them to return was greater than the length of the event.

now that's a little less common and the yearly doctor conference has noticed the homeless and is complaining about it. i think homelessness is a consequence not of any one area but of the american way of doing things. we treat it as an incurable disease, like addiction, but that we don't care enough about to fix.