Our tour operator told us that they don't go to Shark Ray Alley anymore because a snorkeler was bitten on the ear two years ago when another boat started baiting the sharks while there were people in the water.
I don't know if this is a common or rare occurance but, as a novice snorkeler, I did not argue with his decision.
...and besides, I'm not comfortable with the idea of baiting these animals to lure them in so that tourists can 'hug' them, anyway.
Hon