Yeah, that could get you banned from purchasing future post season tickets, the language of the rules for buying playoff tickets was very punitive for people not paying the ageed upon charges.
it all depends on whether you care (also spouses can have separate e-mail addresses, phone numbers and credit card numbers, so it's not like they can ban based on last names). Punitive or not, besides banning you (good luck with that), what can they do, sue you for money that they will then refund?