Advice on specific Sites
Ask.fm - http://www.saferinternet.org.uk/ufiles/ASK-FM-Online-Safety-Guidance-(Updated-Oct-2013).pdf
Facebook - https://www.facebook.com/safety/
Facebook guidance - http://www.saferinternet.org.uk/ufiles/Facebook-checklist-Aug2013.pdf
Playstation network - http://uk.playstation.com/psn/support/
Skype - https://support.skype.com/en/category/PRIVACY__SECURITY/
Tumblr - http://www.childnet.com/resources/how-to-make-a-report/tumblr
Twitter - https://support.twitter.com/forms/abusiveuser
X-box Live - http://support.xbox.com/en-GB/xbox-live/online-privacy-and-safety/online-safety
You Tube - https://support.google.com/youtube/topic/2803138?hl=en-GB&rd=1