I live in the US, and we certainly have our own share of problems with parents sucking, but other people sucking shouldn't impact my ability to make choices for my own family. Rules like these merely restrict law-abiding citizens like myself, those who would let their kids have a phone, drink, smoke, etc won't follow the law anyway.

These types of problems are often pretty easy to detect at school or something, so we should probably instead focus on empowering social workers instead of creating laws that are unlikely to do much.