I recently had an AA gate agent in ORD, after I told her I was near by (yes I was listed for that flight and on the stand by screen at that gate), tell me to stand away from her and that she would call when she cleared me on. Well the jetway door closed and I wasn't on, I walked over to her, she snapped at me and said I can't get on and they she has no time to help me. I had spoken to another pilot who was jumpseating, and told him I had a funny feeling about this lady and my chances of getting on. So when the gate agent took the final paperwork down the CA asked about me, she told him Spirit wasn't in CASS (not true) so the CA called AA SOC and asked if Spirit was in CASS, the answer was yes. He called operations, got a gate supervisor to let me down the jetway. On the way down we saw Ms. Gate agent who told the supervisor that I wasn't getting on and started to back the jetway up. The supervisor told her to stop and put it back on and that yes I was getting on.
I made it and that was my only bad experience on AA, usually I have been treated well and offered First Class if room is available.