[monocasa]

> Penalisation under a "KYC" law would have to be extreme.

Yep. It would have to be enacted in the kind of furvor like existed around 9/11. But, the PATRIOT act had been floating around DC for years before 9/11 too.

> And I suspect there'd be all kinds of challenges to such a requirement.

> Again, the Good Sam loophole is huge.

In the US, it really isn't. It's a patchwork of state and local laws that could absolutely be invalidated by the feds in the case of a global communications medium like the phone network, since that implies interstate commerce.

[dredmorbius]

By "huge" I mean that the plausible set of circumstances in which someone loaned out a phone for a call is large.

It's one thing to put leverage on the already marginal. Another to haul upstanding citizens off for offering a stranger a phone call. Resistance would be huge. No matter how weak any perceived legal shield would be.