Unlike other social media, #Twitter has the habit of shaming new entrants/ supporters of causes by saying - "This has been discussed here for years." So what? The insider groups formed here as just as bad as those found IRL. Perhaps worse, for they aren't immediately visible. Whenever I see cases of online shaming in the name of causes, I worry for the recipient's mental health. Insider groups of all kinds indulge in online shaming. I haven't seen a single group that doesn't do this, so would love to know of Twitter handles that don't indulge in this.