Actually, they did poison kids. They recalled due to their supposedly "homeopathic" (read: water and inactive ingredients) tablets having about a thousand times too much belladonna in them, causing babies to actually get belladonna poisoning and stop breathing.
Pretty serious stuff. Definitely not for my kid. Especially since all the scientific studies that have ever been performed on them say that there is no difference in the effectiveness between Hylands and a placebo sugar pill in reducing teething pain. But hey, to each her own!