There are countless services to block content you don't want.
There are dedicated ISPs and cell phone providers that block content you don't want.
Quit thinking that government regulation & registration are the only ways to prevent children from accessing objectionable content.
Removing internet anonymity as a rule will do far more harm than good. Just because the people you agree with are driving the boat right now, there is no guarantee they will be in charge for long.
Edit: once again the government nanny staters get upset when someone brings up personal responsibilities. Just because it's hard doesn't mean you have to have a government (under the threat of violence) make it easier for you. Has everyone forgotten that social media isn't a right or a requirement for existence? You and your family can just not engage with it.