Good on them, I expect to see more countries implementing this.

Yes, some kids will get around these blocks, but it's important to have them in place as a warning sign to ensure that those who do it anyway are more aware that there is a risk.

Secondarily, it's good mental/intellectual exercise to work out ways to bypass these blocks. It builds good mental pathways that will be useful for the rest of their lives, in hopefully more productive pursuits than social media.