I'm not usually one to argue for broader safety regulations, but the fear behind the restrictions / banning sales aren't entirely off the wall.

I mean look at The Mandala Set that Zen Magnets sells? http://zenmagnets.com/the-mandala-set/

How small are those spheres exactly? They look like toys, or candy. Small children love to swallow things, especially small round non-pointy things, and someone's kid dying or merely getting serious lifelong intestinal damage from swallowing small powerful magnets (like neodymium magnets are), due to intestinal pinching, is no joke. It doesn't matter to a kid if the original product came with a warning label or consent form or not.

Muscle cars, whiskey, full-size swords, chemicals don't look like toys, and aren't as likely to be played with by especially small children. Small separated magnets, especially any that happened to fall and roll across the floor out of sight, seem like a greater risk to me.