I'd also be very curious to the particulars of the case. While I have not personally been ejected, I have seen it happen. Sad to say, the incidents that I observed did not merit ejection, in my opinion. The "air rage" is not limited to customers, I feel the cases that I observed, it was the crew lashing out their frustrations, but impacting an individual.
I take special care to be nice, and say thank you. Sometimes it helps! Be careful with your opinions while on board, they can be misconstrued, misinterpreted, and then mis- directed leading to ejections.
HTH