From real life experince (diving/spearfishing) 3 - 4 times a week I can tell you that shooting fish around Bullsharks is gambling. Here in the Keys they are called "the taxman". They follow you and when they feel like it will grab a fish (regardless of size). Proof being the h&L guys lose Tarpon in excess of 100lbs. to Bulls at the bridge daily May & June.
We do hunt when they are around, keeping very aware of them. Always knowing you may have to swim on your back, lay on the bottom, swim real close to a wreck to keep them out in front or shoot in self defense. As i've previoulsy said alot of us here freeshaft so going for a ride or losing a gun is out of the equation.