The pint glass is generated by the box software, so it already knows the viewing card number and, potentially, can ascertain where that card should be, geographically. So it's absolutely possible.

Oh, right, I forgot about that. Disregard my comment.

They could though, your subscription is tied to a viewing card, which should be tied to your address. They could use firmware on the box to generate a modified pint glass based on that. It'd be a fun game of cat and mouse.