[hakfoo]

The "children's version" has to be engineered to assume some adult users anyway-- since you're going to have some types of helicopter parents logging into the same platforms the kids are on to make sure they're all right. So the threat model of "what if a paedophile gets a Club Penguin account" is already wargamed out.

In many cases, this consists of dramatically limiting user-to-user comms, hyper-aggressive filtering, sometimes even to restricting to pre-canned messages only. (I'm sure someone is already encoding morse code ethnic slurs into patterns of friendly gestures, but that's another story).