However, there is an exception to these rules - and that is the bull shark. Bull sharks have a higher testosterone level than any other shark, thus causing them to be territorial, aggressive and dangerous. Couple that with the fact that they have been found 500 miles inland in completely freshwater, this makes them the only shark I would be afraid of if confronted in the water. They are the only true 'man-eater' shark IMO.
Even then - it's usually accidental.
Bull Sharks tend to feed in shallows, and in murky water, around dusk. They bite on sense of motion/movement, and if you're the thing moving they aren't great at differentiating between you and a fish.
Worst case is - Beaches near a rivermouth after a rainstorm.
The water is extra murky from the river inflow, and the sharks are hunting the river inflow because the rains "flush" fish down the river and into the ocean/river mouth.