Not leaded gas, just leaded food
Hell, I don't particularly care if the food has lead in it, as long as it's properly and conspicuously marked as such. People stupid enough to eat something that clearly says "contains lead" deserve the results; I just shouldn't have to pay for them afterward.
Other countries have fairly decent labeling laws (with things like you can't "comply" by putting the required text in 2.5pt light salmon on pink text in the underlap of the label) that require conspicuous, common sense labeling, (like your product that is named, branded and clearly marked as "peanut butter" cannot be held liable for containing peanuts without further warning, but would have to advise that it doesn't contain peanuts if it's some sort of synthetic peanut butter, and would have to do it in a font of reasonable size on the front of the package) and find bans or restrictions to be much less useful because consumers will just stop buying cookies properly labeled as "now with more arsenic, diesel residue and chicken feces."