I went to a presentation by a cyber investigator last week at which he advised parents A) until the age of 18, you are responsible for all actions done by your children on their smartphones B) remove Blindspot or Kakadu and make sure they are not deployed on their (or your phone) C) if your child uses apps like this, they can be traced back to them, and if used for bullying, shaming, whatever, you will be liable for all legal action D) snapchat is not as secretive as it would like to promote.