So, you can say anything you want on an airliner or a greyhound bus? How about a taxi or uber? Can I call a taxi driver a fuckin' nigger and not expect him to kick me out of his car? And can you show me in those precedents where it is remotely suggested that making things available to the public is where free speech and 1A protections begin? You said you had precedents for these things. Show them. Did you even bother to actually read Marsh v Alabama?