I was watching a tv show I had recorded about those attacks in Reunion and other stuff about sharks. One of the information given was that shark feeding may change shark behavior. The example was when they hang food from a boat and lemon sharks left the bottom, where they normally swim, and went close to the surface, where the food was. I have taken part in a few shark feeding excursions, the most striking in Fiji (for bull and tiger shark, in Beqa). On the one hand it seems like a good idea to get people close to them, so that there are more of us in love with sharks. On the other hand, if it can be the culprit in causing sharks to change their behavior and even become a threat to humans, then, it can't be good.