> It also means your kid has no experience of online interactions with strangers, basically no SNS literacy, which also sounds like a disaster waiting to happen to me.

I think it would be better to allow them to be exposed to all this in a later phase, once, for example, they have plenty of experience with offline interactions with strangers. Learn how to walk, then learn how to run.

I really don't think the opposite order would work.

You would get them used to the more intimate and private interactions first ?

While doing small talk at the bus stop, telling someone you go to the middle school over there is small talk. Doing the same online is asking for problems.

Online interaction require a completely different mindset for a kid, it's a big enough gap IMHO to be treated as a separate thing that can be learned in parallel of offline interactions.

You can learn to swim while learning to walk.