Just imagine
jimmy and jenny , both 15 and in the throws of puberty and access to booze decide "lets do it while mom is at bingo/pub/work"
So they take a photo together as momento BING the thought police bash the door down and they are both dragged off to the ministry of love
Unreasonable? unrealistic? with client side scanning of your phone , entirely likely.
Of course , nobody innocent will be targetted until Mr Jones , fresh out of the shower and keen to impress his missus sends her a picture... and shes forgotton to enable over 18 mode on the phone... well guess hes off to the ministry of love to sit next to jimmy and jenny.
And then theres dear old Aunt dotty... took the neices and nephews to the beach and takes photos... yupp client side scanning does her in too
What needs to be said is that your phone will be scanned for matches by persons unknown whether you want it to be scanned or not and if a few false positives sweep up the innocent, well thats a price well worth paying for getting so many guilty pleas
Meanwhile the kids are using a browser VPN to get a closer view than many doctors ever do