Extra Information on Privacy Settings
How to make sure your Photos are private on Instagram
Do you know what you are agreeing to when you sign up with Instagram?
The document above is a "child-friendly" version Instagram's terms of service based on the original 17-page document created by a lawyer.
SnapChat
Youtube
YoutubeSafety tips if you are posting videosAsk.Fm and other anonymous sites
Just don't go there - it's dangerous and inflammatory
Skype
How to get advice on E-Safety