For those of us Millennials who grew up on Harry Potter, J.K. Rowling’s transphobic outbursts online were one hell of a wake-up call. Now other beloved feminist authors, like Margaret Atwood and Joyce Carol Oates, might be wandering down the same path. What’s that they say about meeting your heroes? — Having 24/7 access to anybody famous is going to result in learning personal tidbits, habits, and opinions that might otherwise have been kept quiet. In the past, we learned scandalous things about authors when their diaries or letters were published post-mortem; think, for example, James Joyce’s incredibly kinky letters to…