https://www.theverge.com/2023/7/24/23806093/mastodon-csam-study-decentralized-network Of course the xenophobic Americans have found a way to whip Mastodon and the fediverse. As soon as a Non American product does well they need to discredit it. We might as well blame the English language, while we're at it.
Stanford researchers find Mastodon has a massive child abuse material problem

Researchers at Stanford’s Internet Observatory found that child sexual abuse material (CSAM) has become widespread on the Twitter alternative Mastodon.

The Verge
I don't deny that the problem exists, I'm saying that the Fediverse is decentralised so immorality is on specific instances, not the entire network.