No, but it certainly has always been a danger and it's probably sheer luck it hasn't happened before when you have this combination of people feeding gators regularly and the lack of warning Disney has given.
I'm the first to say "hey people over-react because, Disney" but in this case...this was the sign on the beach:
That looks like a "Keep off the grass" sign - basically, a suggestion of good guest behavior.
And no one was
swimming - just walking in a few inches of water.
Personally, I'd never touch that gross water to begin with because I know better - but expecting everyone to is silly, and you'd think a "luxury resort" as it's being called would have been a bit more diligent in informing guests.
Given that aside from the gator danger, that there is that lovely brain-eating bacteria under the soil there that has also proven fatal before, I think this is a wake-up call that WDW needed. Not to mention, all the coverage I have seen has been very fair.