I'd find 2, 3, and A to be good.

I see no issue with open registration. I haven't seen any bad folks around in the last few days, so I'm assuming either we haven't attracted bad folks or the mods have taken care of any issues.

I'm not seeing any issue with the scorched earth approach of defederating on this one. Facebook isn't a good actor acting on the greater good here. They just seem to be hoping to pick up on Twitters current weakness while they have a nutjob as a CEO. They want market dominance and profits selling user data and ads.