The general rule was 101th kilometer. The law said you had to drive the homeless this far from a major city and then you could just throw him out.
That was done often, but not always, because the Militzia didn’t want to take these long drives and instead they made the homeless hide when there was some international event.
Like what the homeless were before the name change from hoboes/winos or vagrants, to the “homeless”, they were the invisible men living outside at the railroad areas or other self created camps and zones, flop houses and such in the shadows, the winos who were kept away from the citizens and drove away as vagrants if they started getting in the way of the regular people.