All that I can tell you as a former state trooper is that we never arrested any homeless that took up sleeping in an airport. Airports present a safe environment with bathrooms, heat in the winter, cool in the summer. If they cause problems or beg, we would remove them, but never arrest any.
There was an older man that took up residency in the local airport when I was working in Pittsburgh. He never bothered a soul. In the winter, he would mostly just walk around inside. In the summer, he would leave, but return at night. He said his name was Earl. I asked him once if he didn’t get any money from the state. He said he got $400 a month. From time to time, I would treat him to a meal if I would run into him. As far as I could tell, he didn’t drink or was using drugs. I hadn’t seen him for 2 weeks. When I asked about him, no one knew what happened to him, so I asked the airport manager. He said Earl was taken to the hospital after he may have had a stroke. UPMC was the closest hospital. I drove over there and found out Earl died.
He was buried in what we called Potter’s Field, which was an area in a local cemetery where indigents were buried. I found out he was a Veteran, so I was able to collect enough money to add to what the VA gave to have a small marker put on his grave. It said “Earl - Unknown to many, but a friend to everyone.” There were many unmarked graves there.