As long as the child's age isn't too low like 6 or 7, they'll be fine. Many children are taught and informed of the dangers about social media, so they know how to be careful. Plus, it is a great way to chat with friends outside of school. 11 year olds, for example, are well aware of actions and consequences. They shouldn't be stopped from living in the moment with their friends. Yes, it can be dangerous but some kids know how to behave properly and in a very mature way.