I don’t care how much you love a baseball team, or any sports team for that matter, this does not make it ok to drop an f-bomb when something does not go your team’s way. Especially at levels in which I can hear it on the other side of the gym. Additionally, this is not limited to f-bombs either, any sort of outburst of derogitory names or anything similar.
Oh, and wearing headphones with your music blaring while you do this makes it worse.