“There are numerous items that you can purchase online that are lethal if ingested, in fact, there are even more such items available at any hardware or feed store.”
*Water*, which you can get out of your tap at home, is lethal if ingested in sufficient quantities. It’s also lethal if inhaled in much smaller quantities!
BAN dihydrogen monoxide!!! (sigh)
I have a better one, ban monosodium glutamate
Dihydrogen Monoxide Research Division
https://www.dhmo.org/