[nkrisc]

That's precisely the problem: I don't know how big of a problem it is, and I'm not keen to find out. I know it's enough of a problem that it's easier to simply shop elsewhere.

I personally know a few people who have gotten counterfeit items, even including consumables like protein powder. I don't have to buy from Amazon so it's just a chance I'm not going to take until such a time I can be convinced it's not a problem. It's not any more difficult or even expensive for me to shop elsewhere so I don't have to be particularly rational or thorough about it (I don't have time for that!).