I will accept that the hazards may have been insufficiently obvious prior to the warning label that states exactly what might happen to a person who eats Buckyb

I will accept that the hazards may have been insufficiently obvious prior to the warning label that states exactly what might happen to a person who eats Buckyballs. I believe the warning labels on the packaging are sufficient to entirely shift responsibility for safe use of the product to the purchaser. The general principle I'm advocating here is that product manufacturers should not be liable for injuries when the potential hazards are either self-evident to a reasonable adult[0] or clearly marked on the packaging. This might get a bit murky when a product is marketed to young children, but as far as I can tell, Buckyballs were definitely not marketed to age groups who were likely to eat them.