I think it's reasonable to say that *most* of us don't blame Disney or the parents for what happened and are commenting on prevailing societal attitudes and the general dumbing down of society as a whole.
I don't blame either. It was a tragic accident. It would be unreasonable for folks from the Midwest to understand the danger of wading around bodies of water in Florida at night. Should Disney have had clearer signs that stated why no swimming? Probably, in hindsight.
But residents of Florida, who should know better, lose dogs to gators when they allow them to walk around the edges of Florida lakes and ponds. We had a gator in the water hazard behind our home in Miami. We never let the dog walk unleashed down the edge of the golf course. For a very good reason.