Different sport but, back in the day if Georgetown beat us in a big game, and then tried to plant their "flag" at midcourt...I'd expect our players to not let it happen. That's not "celebrating", its flat out disrespect.
It's one thing for Big John Thompson to declare "Manley Field House is officially closed", it's quite another for opposing team's players to rub your face in it, after a heated battle, on your home court, in front of your fans, like you ain't worth the respect.
It absolutely should be banned and heavily fined, because it'll trigger more fights as long as it keeps happening.. JMHO