...that person can sue for damages.
That's how we deal with these problems in a free society. There's no need for the government to force producers to label their products or otherwise regulate their activities. You have no right to force someone to do or not do something in order to prevent them from possibly harming someone; you only have the right to force them to make restitution if they have in fact harmed someone.
"Alas! I believe in the virtue of birds. And it only takes a feather for me to die laughing."
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