PIT-MCO, August 1981: My brother was in his "I will only wear Yankees attire" phase. We pre-boarded, because my other brother was quite young at that point. All of a sudden, my Yankee fan brother started freaking out: The entire Pittsburgh Pirates minor league team was boarding, and he was embarrassed to be outfitted in Yankees gear.
And about 3 years ago: I missed an LAX-PIT upgrade on a Thursday, and was seated in 8D. I caught a glimpse of Melody Thomas Scott (from Young & The Restless) in 2A or 3A. (I don't watch Y&R, by the way.)