I'm sorry for their loss, but don't blame the manufacturer of the seat, or ban them from sale. I couldn't do without mine. I know for sure that it says onthe box, as it does with all baby things of this nature, that it is not a safety device and children should not be left unattended while using one. Nothing is fool proof that is why they print these warnings.
Maybe I'm paranoid but I won't even got 1.5 meters away to get something out of the shower without taking my son out of his seat. For the moment it takes me, he could topple over or slip under and drown. I'm not prepared to take that risk. A child can drown in the smallest amount of water, and we are constantly warned of the dangers of children and water.
I don't think that these seats should be banned because of other peoples carelessness, like I said previously I couldn't do without mine. My son now likes to sit in the bath but every now and then will suddenly stiifen himself out. The combination of water, soap and bubble bath make him very slippery and a few times he's nearly slipped out of my grip. So I've started using my bathseat (under constant supervision) and bathtime is now more fun. I've also found that the bath pillow I got with my Huggies playtent acts as a good cushion to put behind him so he can sit right up.
member since 2004