@sethcotlar looked at the original artivle itis writing about - no claim of a majority of content. In fact, none has been verified at all:
"This instance no doubt hosts very serious child porn content (although again, I can't verify that as there is no way in hell I am looking)."
Seems to be a UK based writer, which may be lucky for them since US law would require they report it to law enforcement or they can be held liable. But they searched for adult content and found a group they say is for pedophiles and they assume a declared support group apparently set up to kerp members from harming people must be posting porn.
https://www.secjuice.com/osint-mastodon-paedophile-csam-child-porn-problem/
It is assumed Mastodon foes not monitor the space.

In the last few days I've been fortunate to witness an interesting chapter in the Internet's history, and I'm trying to compile a timeline of what has happened while the memories are still reasonably fresh. This is incomplete and a work in progress; I'll be updating it, and n...