While I've seen some brusque FAs on UA, nothing compares to the horrendous psychopaths that used to work the old USAir. I had one guy who was so vicious to passengers he did everything short of striking them physically. Aggressive, suspicious, yelling--just awful. At the end of the flight I asked one of his co-workers what his name was (of course he wasn't wearing a nametag) and he came barrelling up the aisle yelling at me, getting up in my face, and generally escalating things (and loudly refusing to give me his name). Thank god I was deplaning. And when I went to the CS desk, fuming and complaining, the agent barely even looked up at me. (And this was only one of many incidents, and I don't even fly that much!)