Typically, B- and C-list stars use the dreaded phrase “Do you know who I am?” to bully their way into nightclubs and buzzy, fully booked downtown restaurants. So when The Real Housewives of New Jersey cast member and convict Teresa Giudice employed the phrase in front of the Taylor Swift at Coachella last month, I assumed, like any well-intentioned celebrity-gossip aficionado, that she did so out of a total lack of awareness of her place in the celebrity...