If your kid can't swim you shouldn't let it go in on its own. There is no reason to spoil the fun for everyone.

You can ban all fun or tell parents to use common sense and have a backup for idiot parents.

In this specific pool I would also create a barrier/line between the shallow bit of the pool and the deep end. In some of the videos the kids end up in the deep end by just playing, even without the floating devices.

Also kids should be taught to swim at a young age. At least where I'm from there are many places where kids can fall into the water.