I'm just glad nobody has gotten killed yet. I still plan on doing this when we go on our cruise next October. Fortunately I'm a strong swimmer. But being a good swimmer doesn't do you squat if you don't know what to do in a emergency situation. It's the number one reason why people die in the water, they panic and they drown.
They really should give basic rescue courses in school at least for those schools that have swimming pools in the High Schools.
We had this in my Girl Scout camp, basic rescue & water safety. I never forgot the lessons.