Amazon account gets blocked? He gets a new one. If they block him because they check the PO box against blocked accounts, he gets a new PO box too. Sure it's a hassle because he probably uses it for other stuff too. But nothing really preventing him from doing the fake name+PO box thing for a small likelihood of this ever happening and he'd probably gladly just get a new on if it ever did and there was no other way to convince them.

Same with Apple. Apple id gets blocked? Get a new one. I somehow doubt he's bought (err, sorry, rented) thousands of dollars worth of digital content on either platform that would discourage this. Streaming is fine as you can stream the same stuff again on the new account.