http://protonmailrmez3lotccipshtkleegetolb73fuirgj7r4o4vfu7ozyd.onion/blog/why-client-side-scanning-isnt-the-answer
In a letter (new window) opposing the European proposal, over 100 privacy advocacy organizations expressed specific concerns about client-side scanning. Child-abuse survivors describing their trauma to a trusted adult could be flagged for monitoring and reported. Anyone who sends an intimate picture could have that picture mistakenly flagged and examined by a third party.