I have a friend cheated (sexting) on their spouse, and wasted money on an addiction for years. They're working on it sommore power to them, however it was definitely shitty behaviour.
I on the other hand I'm part of a few shaming groups on FB, for the most part I just have a giggle, but don't post much myself. One day she saw one of my posts (screenshot of another person) and told me how disgusting it was, that it was bullying, etc... Which is fine I agree, but IMO has not moral standing to pass such a judgement.