I agree with you 100% regarding the counterfeit trade. I purchased a 72mm lens cap for my Nikkor 18-200mm VRII lens, having left the original at a friend's house out-of-state, and later thinking that I'd lost the replacement, I returned to the same page where I purchased that one and found buyers who were warning of counterfeit lens caps and showing the differences with pictures they'd uploaded. Although I was on the same page as before, the seller was different this time, so I purchased a new cap and it was a good one. Later, I found the other lens cap and sure enough, it was a counterfeit, having the same tell-tale signs that other buyers had demonstrated in their photos.
In this case, there is no harm to me the consumer, but I highly resent being sold counterfeit goods and I'm inclined to believe that there is no excuse for it as the seller should know where the products he buys come from.