Madonna, like her wayback namesake, means a lot of different things to different people. You don’t get to be an icon without being able to contain multitudes. So when she appeared at the Grammys with a face that bore little recognition to her original visage, or any 60-plus-year-old woman’s visage, or, to many, any normal visage at all, people had opinions, and thanks to the glories of social media, we got to hear just about all of them.