[Adam]

Aside from fighting (the obvious), I'll give you an example.
2nd quarter of a BF game, B1 shoves a breakaway shooter from behind. I hit him with the intentional.
Early in the 4th quarter, B1 does it again; this time with a smaller shooter. B1 is 6-2 250 and the shooter was about 5-8 150. Not only did he shove him in the back, he wound up and shoved "through" him. The intent was obvious, and my partner went immediately to the flagrant call.

His parents weren't happy. Apparently, his dad tried to get to our locker room after the game. Then, his mom called the school (game admin was a varsity official in our association) and complained that they (the home school) and the officials were depriving her son of his right to play ball (due to the one game suspension that comes with a flagrant foul).