CATMAN, I am not sure which TRAAIN/TRAAM or whatever it is now called you rode on, but I have only ever ridden on the one in the old terminals 2E/3E now terminals A & C, I believe, TRAAIN. I have never encountered homeless people on these TRAAINs, probably abecause they are contained within a security/restricted area. They are however very bumpy/jerky, but I have never missed a flight as a result of them. My only current gripe is that they have an an extended route now past the new Terminal B station which has not yet opened, so the trip is unnecesssarily extended a few minutes.