I agree. Security and signage will be changing. But I still don't see this as Disney or the parent's fault. I think it was a freak accident that just happened. Sometimes no one is to blame. With the statistics of the number of Alligator attacks mixed with the number of deaths, you can't say that anyone should have seen this coming.
Now would I personally walk along there? Probably not, but then again I am a little paranoid about all that stuff now that I am educated. But when I first moved down here I walked my dog along a pond (not in it, just along it) not realizing the rule of if there is water, there is a gator. A couple days later some co-workers were giving me the information about things to look out for and mentioned that. From that point forward I never did that again. So I think some signage is needed so non-locals understand that there are gators in the water.
In South Carolina I believe it is a law, every place I have been to with water in SC has signs saying gators can be present, do not feed them. We always laugh about them because we can't understand why anyone would think it is a good idea to feed a gator. But we see those signs a lot in SC. Maybe Florida needs to adopt similar laws for public non-residential areas.
But I do have an issue with this family suing and winning if they do. You going to sue the state if you get eaten by a shark? Or drown in the ocean? Etc. Some things are acts of nature that just can't be prevented.
This is a very sad event and I hope some more effort goes into awareness and less effort into who is at fault.