Even if 10% of population were actively criminal pedos (which is waaaay too high), its pretty safe to assume that the majority of even their online footprint wo

Even if 10% of population were actively criminal pedos (which is waaaay too high), its pretty safe to assume that the majority of even their online footprint would be ordinary images/messages. So a quota of 0.1% or even less material being detectably criminal sounds realistic (probably not much less, though).