Most states require the resident purchaser to pay applicable taxes.
Since these people haven't paid their taxes on these purchases they are in violation of the law, so it's a legal thing, not a privacy thing, and Amazon is the most likely place to collect from the most that haven't paid their taxes.
So it's really not a privacy thing, it's a scofflaw thing.
Which probably puts NC's legal request for tax collection as the winner.
Don't yell at me, I don't like it either, I'm just telling how I think it'll go down.