None of these has positive effects Why not?

'None' was too strong. I agree that there are positive effects - but not if ignorance is used too much.

I think it's pretty useful for kids to learn that the explicit rules aren't the true rules. And that authority does turn a blind eye sometimes.

I agree with that too. With four children authority necessarily has a blind eye often enough.

It depends on what your goals are.

The goal is to give the children a save home from where to conquer the world.

A lot of possibilities to explore even with the risk of getting burned but not seriously harmed.

A lot to learn but firstly things they are interested in and that are at their zone of proximal development.

Some discipline and endurance.

An extended family where they need to adapt to different rules and customs.

Sometimes, children don't notice their parents noticing. And that's great for kids. They're safe, but don't know they are, so feel powerful.

Mostly they don't notice. Parents develop eyes in the back of their arse and a hearing radius of about 100 metres. (Well, it feels like it.)