But they are taking about monitoring public facing social media - frankly I think it would be daft if they did not do this.
If a be teaching assistant starts publicly posting harmful harmful content there should indeed be systems on place to ensure this is identified and appropriate action taken.
If you post publicly you have to assume everybody, including your employer, might see it.
I think splitting the user base between them is probably good. Ideally TV/radio will stop defaulting to "tweet us with the hashtag..." They'll have use multiple channels and that might open the door for Mastodon and the fediverse too.
I'll keep saying it, but I'd like to see another big player (Microsoft, Google etc) embrace activitypub. That would bring balance and snub EEE for Meta.