How the hell was the lagoon not barricaded? This is Disney, FFS.
Because most people don't go into random lagoons that only serve drainage/decorative purposes. Frankly, I think the signs that warn of alligators weren't even necessary to begin with. People down here don't go into them.
Most people found in the mouths of alligators usually died of something else. A few months back, a guy had a heart attack while fishing and fell out of his boat and drowned. His corpse was found days later, being devoured by gators, but the autopsy showed he was dead.
Another interesting gator incident involved a 22 year old burglar who got caught inside a house located in some gated golf course community and took off, fleeing the police by jumping into a lake and attempting to swim to safety. The gators got him. But cases in which fatal gator attacks actually occur are quite rare. I've certainly only heard of a handful.
Actually, a few years back in Boynton where I grew up, there was a massive gator (forget the actual size) that was showing up in peoples backyards and pools. Each time Animal Control was called, it managed to allude them. It made four or five more appearances across the eastern side of town (where I lived) and was eventually caught in the backyard of some kid who I went to middle school with. The "manhunt" (gatorhunt?) for it was sort of a bemusing spectacle that made the news each night.