It is also bad for the company whose product is being counterfeited because their brand is associated with the poor quality knock off.
This is also the reason I hate print on demand and think the seller should have to specify how a book was printed.
Maybe you think counterfeits are equal in quality to the genuine articles. In that case I think the argument is different. But I don’t believe that is the case.
I mean, if you are really willing to buy an original product, a minimal check can be the price asked for it.
Any good today is made of materials+manufacturing+marketing, it has some costs and a corresponding selling price with a given markup.
Once said that a number of branded items can have a selling price that seem completely disconnected from the relative costs, there are limits.
If you can find an item on the manufacturer site at US$ 100, do you really believe that you can find the SAME item on Amazon for US$ 10?
If you find it at say US$ 80 or 75 or even US$ 50[1] and it comes out as being counterfeited, you may have some valid expectations ruined by Amazon, but if you ordered it for 19.95, free shipping, did you really believe it was "original"?
[1] it is one of my per peeves, if you look at the price of many electronic goods, let's say printers or TV on the official site of the manufacturer they are often double their "street price", either online or at the nearest large shop chain. I often wonder how many printers Brother (say) sells from their site.
It's literally life or death purchases, and climbing forums have to warn people to avoid Amazon because the risks are so high.
Only on Hacker News is this a question people have.
My concern is more on the fraud side. When you buy something usually you can follow up with the seller if the product is defective or damaged, when people fraudulently report themselves then that follow up is impossible. Additionally, legitimately imported goods should adhere to certain domestic safety regulations, the enforcement of this is complicated, imperfect and not always effective, but enforcing safety standards on smuggled items is a fool's errand so if there are unsafe materials that are significantly cheaper then you're more likely to find them in counterfeits.
So, without even touching the question of brand name entitlement and the defense of intellectual property... I think there are some significant reasons that counterfeiting is, indeed, really bad.
The fact that you even asked that is pretty sad, though...
Of all the things for the counterfeiter to fail to replicate--
That and burning your house down with fake or bad wiring from faulty electronics. Or a bestselling novel with the last 100 pages missing. Or a flash drive with only 1% of its labelled capacity.