> Facebook, Twitter and Google (YouTube) have used that strategy to ignore their obligations to filter their content by getting into some type of "too bug to fail" situation and throwing their hands up when they are asked to do their duty

I don't think this is quite fair to YouTube. They've spent hundreds of millions of dollars developing ContentID. It's not perfect, but it's without a doubt the most sophisticated system to date. It's a difficult problem, but I don't see how you can say they've "thrown up their hands".