I saw this in another thread on /c/Showerthoughts. I think it’s important for this to be circulated widely so that the broader Fediverse community is aligned. We don’t want admins second-guessing their decisions when users start infighting. We should be united in our thinking and ready to protect our platform.
Just found out Matrix can do this, although you need to host your own server. There is also Beeper for a fully-managed product, but you need to wait to get access.