I didn't knew you have more sons, congrats! About children under 15 years old, I don't know what to say, a part of them may be using Facebook from 12 years old, but still not enough to cover that 1.1 billion people missing from the calculus. There could be devices indeed, but who can say for sure?
In a conversation of two IT guys that I caught ~two years ago, they were saying that the smart devices from Samsung were not safe to talk your secrets next to, because they may be recording everything. I never took the time to check it, but it wouldn't surprise me to find it is true.
Have you also thought about duplicate accounts? I knew a guy who had 5 of them :))
Aha! Duplicate accounts? I never thought of that. I guess 5 accounts means 5 identities? That’s himself plus 4 catfish accounts? Maybe you could expand on that guy’s motivation for having so many accounts?
He tried to get in touch with many gurls (mistake on purpose), but since some of them were pretty active on his first account and he could not talk to others from that account, he made the second one. And so on :))
Also, I have seen people making second accounts for anonymity, like getting into political fights, but without letting this messing up with their friendships. I guess there are a lot of reasons why people who are socially active on Facebook will have many accounts, I needed my FB account for an university group where announces were posted, homeworks, projects and stuff like that.
So if he is talking to 5 hot chicks at the same time, and if each of those hot chicks has five accounts to talk with 5 hot guys, and so on, the numbers could start to make sense.
You got the point :))