Earlier quoted context omitted.
Disagree with essentially all of this. To get a Facebook account they require all sorts of PII. Why not have people give their PII to set up an advertising account and if they distribute CSAM then they are banned. Removing access to WhatsApp will stop a large portion of the world from participating. And the parts that can't? Well, they can't advertise on Facebook/Instagram anymore.
Probably a case of "hate the game not the player" CSAM is highly illegal, no doubt these accounts are getting banned but likely not charged (who knows what jurisdiction the advertiser is even in) clearly they're able to pass the current bar. This is conjecture but I'd bet that in all likelihood someone at some meeting at Meta has floated the idea of moving impedance to the signup to try to limit this phenomena. Maybe…
Presumably not dangerous enough.