Well duh. Same as you make sure no sharp, pointy objects are lying around and electric outlets have child safeties.

Should we ban knifes now because children could cut themselves?

How about Teddy Bears with razor blades for stuffing? Ban or no?

The idea is that the product is more dangerous than appearances might let on.

Knives are necessary, not toys. Switchblades are useless, dangerous toys, and are often banned. So there you go. Anyway, I'm not advocating banning little magnets anyway--I do own some, you know--but pointing out that ordinary non-stupid use of them + a toddler could result in problems.