The question I have about this, gun related content and anything else that is "A violation of our T&C" is this: when does YouTube/FB/whatever stop being a safe

The question I have about this, gun related content and anything else that is "A violation of our T&C" is this: when does YouTube/FB/whatever stop being a safe harbor according to the DMCA? Which special interest group (NRA?) is going to bankroll the law suit against Google for hosting copyrighted content without permission and that they are entirely liable because they're exercising editorial control? Or is the safe harbor provision toothless because Google is a giant?