I have never been to NYC (well, 'cept for an hour or so at JFK), but when I was in Chicago in the service in the 60's, the PD walked thru the Greyhound station all the time checking for tickets; no ticket, no stay in the station. That included bums, GI's in uniform, anyone, and the weather outside be damned. No ticket, out you went into those famous Chicago winds (I had never seen snow, sleet, and hail come down sideways before, all at the same time). I don't know if they have lightened up over the years or not...