I would supprt pre-emptively defederating Facebook / Meta.

Directly relevant history: they allowed their users to talk to third-party XMPP servers as long as it suited their business. With size comes arrogance, so while doing that, they introduced compatibility issues which caused other people much avoidable work. Finally they blocked their users from interacting with third-party messenger apps.

Indirectly relevant history: Facebook has caused damage to society by allowing better manipulation (targeted advertising) and helped fuel conflict (preference for content that makes people click).

A company with their history and ownership model can be expected to behave selfishly to the detriment of others.