The new social media have brought about a return to an ancient phenomenon, public shaming. Tthis gives us a way of understanding the otherwise bewildering phenomenon of tsara’at.
The Sages were eloquent on the subject of lashon hara, the sin they took to be the cause of tsara’at. But there is a meta-halachic principle: “From the negative you can infer the positive”.Therefore there must in principle be a concept of lashon hatov, good speechץ