[KerrAvon]

TFA says:

> Unlike most Mastodon servers where you can sign up for a personal account, we're only using this instance to host BBC accounts; it’s a place for us to publish in the Fediverse. If you have a Mastodon (or other ActivityPub) account from another server, then you can easily follow our accounts.

So if there's CSAM, it's coming from the BBC itself, which is hopefully unlikely.

And the fediverse / Mastodon already takes care of filtering. Niche instances failing to police CSAM are defederated by mainstream instances, which means they're unreachable to anyone on the mainstream instances. This could be improved and automation tools for use by moderators are certainly welcome, but generally speaking as a user you're not going to see objectionable content unless you go looking for it or your admin is negligent.

edit: typo