That's only possible with local-only apps like a text editor or a sensor reader. Anything interactive MUST collect data as a matter of course, and usually use that data. There's a lot of potential for weaseling just from that, no matter what laws you put in place.
The ONLY way you can prevent something like an e-tailer from collecting and PII is to trust a third party to do it for them. But that just shifts the burden, resulting in a "Quis custodiet ipsos custodes?" situation, which last I checked is an intractable problem. Commerce requires trust at some point, and that trust can always be betrayed.
Biting the hand that feeds IT
