> in which case either the device is placed in "child safe" mode, or printed instructions are directly provided giving instructions to do such

It's not hard to imagine a jailbreak showing up shortly to defeat it. Even Apple can't prevent jail breaking for their devices. I think it's unreasonable to expect other consumer devices manufacturers to win a game of cats and mouses like that.

Requiring legislations on this is even worse. It will serve as a regulatory capture for big corps that can afford to invest on security.