There is no way to be certain that those chips will comply with the specs and they will taint the supply chain. Traceability is extremely important in the hardware business.
That may be true - I'm not a hardware engineer. But it's interesting that that sounds exactly like the propaganda that proprietary software vendors used to use to warn against open source software - you don't know what you're getting, you have no guarantee it will work, etc.
The difference is that as far as I can recall there weren't people trying to pass off open source as someone else's proprietary software. You didn't think you were buying a copy of Oracle's DB or Microsoft Office and actually get a wrapper around MySQL or a restyled Open Office.
You choose whether your wanted the propriety program or the open source program, fully aware that they were different programs with different abilities, features, limitations, and bugs. You could compare them and decide which suits your needs better and then reliably obtain that one.
With hardware the fakes are being sold as the genuine part. You really don't know what you are getting and really don't know if it follows the spec. You might for example think you are buying a 3.3 V microcontroller that has 5 V tolerant input pins (meaning you can hook it straight up to a 5 V sensor you are using), but the fake is not 5 V tolerant and won't work for you unless you add a level shifter to your design.
There was an article submitted to HN nearly a year ago [1] about fake/counterfeit DS18B20 temperature sensors. That article gives a good look at all the different kind of chips you might end up with when you think you are buying a DS18B20, with lots of details on how they differ from the real ones.
It isn't like stories such as this one are rare. Unlike the FOSS v. Proprietary story where it's all anecdotal, we have actual events like this [0] one:
> These differences mean the fakes likely have higher power usage and lower sensitivities, even though they are functionally identical. The foundry could have marked these devices as Si24R1, which is compatible with the nRF24L01 and no one would have been wiser. But the lure of higher profits was obviously too tempting.
There’s a difference between open source and counterfeit chips. If someone wants to make alternate parts with similar specs, that’s fine and a normal art of business. The issue here is chips that look genuine but aren’t.
