Parents kick them out. Friends stop letting them sleep on their couch. In georgia my daughter was always asking to let homeless or the near homeless friends of hers stay for a few days. I dont mind feeding them but when they start feeling entitled out the door they go. Older son asked if his homeless friend could stay in the georgia house with him. I never liked the little shit and since I came up for thanksgiving I find about 1k worth of tools missing. Do to the little weasel's being in the middle of my son doing stupid things to get arrested he was already banned. Of course son claims there is no way the little weasel stole my stuff but he has always been selling stolen things over the years.