Maybe I missed it, but I didn't see if this was done before or after the pandemic lockdowns started. I've got a hypothesis that the Twitter (etc.) mobs are getting worse precisely because of the lockdowns.

Locked down, with very little to do, people are desperate to feel like they're doing something useful. Joining in an online mob feels useful. It makes a person feel like they're doing good in the world. It gives them the rush of accomplishing something. It's an illusion, but there's a lot of feedback (upvotes, faves, retweets, etc.) that makes it feel real to people.

I don't have any great ideas for how to improve it. I've been asking myself "will this actually do any material good?" before engaging, and I significantly cut back on social media. But good luck convincing everyone else to do that, too.