Illegal? No, at least not in any sane jurisdiction. It's no different than moving a SIM card between phones. Confused? Maybe but probably not. It depends on ho

Illegal? No, at least not in any sane jurisdiction. It's no different than moving a SIM card between phones. Confused? Maybe but probably not. It depends on how they track things. An ISP I had in the past tagged subscriber accounts on the OLT side.