" You see many other passengers were traumatised by this incident and there is a very real possibility for a class action by these passengers against United. "

LOLOLOLOL.  It was a PR move.  And if people were traumatized by watching a grown child throw a tantrum and resisting direction before being roughed up by some cops, I suggest they put their helmets on... real life is "traumatic".  As far as a class action, what are they going to sue for?