Never saw that before. This should be standard everywhere.
I can't vouch for how seriously those different countries look at the issue, though, despite what they have legislated, e.g. I once had a relationship with a Korean who had been physically abused by both parents and teachers. Here in Denmark it was outlawed in the 90s and isn't very common.
In the US, it is generally legal to spank a child. Or do things like make them do physical labour or write the same sentence 100 times, knowing it makes hands cramp. The elementary and middle schools I went to technically could spank you with a paddle too. I'm only 44. I know similar things happen in other countries: Another commenter has a link with a map.
I live in Norway now. If you spank your child, even if it obviously doesn't hurt them, you can get child services visiting your home.
Most places no one really gives a shit if it goes the other way around, like young kid hitting parent or wife hitting husband.
It is. But just because it's illegal doesn't mean it doesn't happen.
Many societies (and oh how I want to write “most civilized societies”, so I do) also apply different standards to kids than to adults.
There’s no point in doing this. No one feels like you’re withholding judgment, or that you are (not) an enemy to their values. Either go with “most civilised societies” or don’t. Don’t be extra petty.