According to this article, becoming a Mrs. also means, "People will know you’re truly off the market." While this may have been true in the era of promise rings and letterman jackets and underpaid secretaries, today you're "off the market" when you change your Facebook status, when you wear a ring (if you decide to do so), or when you goddamn say "I'm off the market." With more and more people choosing not to get married but to be in long-term committed relationships, changing your name is no longer an effective way to communicate that you're taken.