When I was still a moderator, I used to post warnings every so often urging everyone to show some restraint in posting sensitive, personal and/or inflammatory things. Any prudent person has to assume that management of every airline is actively monitoring this site. You would be incredibly short sighted if you did not think someone has a file containing every post you produced.
I am no longer a moderator, but I am still a lawyer and this is my free legal advice
du jour.