Earlier quoted context omitted.
At least for the US, I think you are overestimating the restrictions on private establishments. Stores don't do invasive things because it doesn't make business sense, not because the legal system particularly enjoins them. Like if I opened a candy shop that required agreeing to an NDA for entry, what law do you think would make me let people in without signing the NDA? It might not be enforced, but there isn't anyth…
It was just an analogy to make it easier to demonstrate the disproportionate effect DRM has on paying customers. I don't particularly care about entering into a debate about what kind of abuse of people US laws allows.
The disproportionate effect DRM has on paying customers doesn't seem to be obscure or difficult to think about though.