There are numerous stories of people getting kicked off of planes for no valid reason.
This is may be the most convincing one found on YouTube. I know there were 2 sides to every story and when not hearing the one from the airlines, I don't know, but it seems like this guy's neighboring passengers are all supporting him. You combine this with reports of FA's losing it during a flight and I wonder what is the chance that a decent person will be kicked off a flight for some sort of a innocent misunderstanding or miscommunication.
Why didn't the agent's involved listen to this guy's neighboring passengers? Guess they see this as a point of no return