A friend of mine whose son is 10-year-old already has a Facebook account. Don't you think it is crazy to let your kid have FB account at this age?

It is absolutely crazy. Facebook actually has an age limit of 13 years. With the increasing number of cyber bullies and predators, it only scares me about that 10yo. I am equally clueless on what influence access to social media at such an early age might have on him. It is true that kids often do what they are told not to do. Parents should play an active role in monitoring their kids' activities. Indulging in social media might give parents a break of a few hours but it definitely is not worth the effect it might have on the kid. If you could, please advise your friend against it. Or at least advise her to monitor her son's activities on a regular basis.