i used to be just the same but my dad was like NO ,A FINAL NO unless you're the right age (13) for having a facebook account so i waited and waited and waited until i was 13 i made an account...my dad was still not convinced but i was already done with it however, a year later or so i found out it is soooooo boring....its just the parents feel that the online danger is just above our imagination and even if we think we know the problems that may arise and we will be careful, they are worried about us. and its true, we may think that such crimes that happen because of social networks and far away from happening to us we're wrong.
Prove to your parents that you are aware of and understand the dangers. You will need to do research on predator pedophile strategies, cyber bullying, scams, inappropriate use of Facebook. Lay it all out for them.