Creating an id check does increase the risk, it would be an additional attack surface.
Social media may be dangerous, but I feel it should be supervised by the parents and that the government should provide the parents with good tools to supervise them. I do not like the idea of having websites being able to verify my identity, if it were to come to that I'd hope it would be for something more reasonable than protecting children from social media. I may prefer outlawing social media altogether at that point.