That's such an unimaginably horrible realisation that we shy away from recognising it, but it's true and we have to confront it if we want to keep children safe. Locking them out of online contact is likely to isolate that block of vulnerable children to a worse degree. Furthermore, when children go on social media anyway, which they will do, they're now doing something illegal, which makes it much *harder* for them to ask an adult for help when something goes wrong online.