You might've read the spec but you're missing the point and your approach is naive. For me it's about crossing the line. If you want to be snooping around my phone or my house, you need a warrant and go to official channels provides by my gov officials. And you really think it's as simple as picking apples from oranges? I mean come on. Yes, it's easy to implement hash check to see if u have some known child porn in your cloud. But was that the use case for the advocates? No. Their use case was to try finding abuse and that would need a more thorough scanning. And once we're there, we have to make hard decisions on what is porn or abuse. If u think it's easy, then you need to it through harder. Think of some picture from sauna where there are naked family, might be harmful? But normal here in Finland. What about a stick figure cartoon what depicts a some shady sexual positions with a smaller child-like figure in it? Or what about grooming, asking for naked pics? How is this system going to prevent that? I mean, I get why ppl would want something like this. But it isn't the right solution imho.