Every time an application (i.e Firefox) removes a feature due to "low user adoption" I feel the extents of this kind of UX misunderstanding.
722 karma · joined March 12, 2021
I'm (almost) certain any Google service will tag CSAM for reports and will also hash content it deems illegal for the NCMEC too [2], so I wouldn't be surprised if Google Photos already did something like this.
[1] https://en.wikipedia.org/wiki/PhotoDNA
[2] https://transparencyreport.google.com/child-sexual-abuse-mat...