it was in the news recently, an Israeli guy was hanging out with dusky sharks, a somewhat common past-time as they've always been considered to be safe for humans, but they ate him and dusky sharks are no longer considered safe.
"A report by two shark experts has concluded that regular feeding of the large assembly of sharks at the site had encouraged the animals to adopt “begging behaviour” that led to the fatal incident. "
It won't stop me hanging out with sharks when I get a chance (but only some species - not Tiger sharks or White sharks!).
