Public shaming is back. Once done in town squares, the subjects of our ridicule locked in pillories and unable to avoid the rotten fruit and insults we hurled at them, now the shaming takes place on the internet. No longer our neighbors, the new targets are strangers and celebrities, and instead of courts meting out justice, it is the aggregate outrage of well-meaning people on Twitter just like you. Listen as author Jon Ronson describes his new book, “So You’ve Been Publicly Shamed,” in which he spends time with people who have had their lives ruined by modern, web-based public shamings in an attempt to reveal to each of us what can happen when, alone but together, we obliterate people for unpopular opinions, off-color jokes, offensive language, and professional faux pas.