To which the reporters probably replied, "Oh, so you've flown with United before."
What's surprising is that this affects all passengers on a plane. The passengers in coach/economy/sardine class are naturally going to be more irritated, but this spike in "air rage" also affects the caviar lovers in first class. In fact, they are almost 12 times more likely to throw a fit if they board from the front of the plane instead of the middle. The researchers called these "entitled reactions," which is a more tactful way of saying that watching all the peons shuffle past you to their economy class seats turns you into a smug, insufferable little s**t.
It's worth noting that some airlines are working to reduce this. Some are toying with creating a Downton Abbey-style system with two jetways for boarding so that the proles and the aristocracy never have to cross paths. As it should be.