There are warnings that paedophiles are posing as food like chicken nuggets and ice cream to target children online.
In comments quoted by The Irish Examiner, forensic psychologist Maureen Griffin warned that paedophiles have found "new and novel ways" to access children's information.
Social media experts say sex offenders are choosing objects that children would see no reason not to add as a friend.
They are then able to gain access to personal data and photos.
Dr Griffin says in one case a known sex offender set up an account in the name of a road a school was located on and 400 girls accepted his friend request.