Re: "I've been a customer of theirs since 1999 when they only sold books"
It's kind of difficult to find lead, mercury and cadmium in books. I think you really have to find a very specialized print shop to get that stuff into a book.
However, Chinese companies have already been found guilty of putting lead into almost everything under sun, including milk formula. What kind of utter asshole thinks that was a good idea is beyond me.
In any case, although you may be right, the post you replied to is not necessarily wrong either, because when Amazon started expanding its product base, it quite obviously behaved toward the new products just like it had with books - ie no check whatsoever.
In other words, you're both right.