When Skip Teacher approval has been selected during the setting up of blogs, there is an additional safeguarding measure in place.
It is possible for any posts created by children and comments added by children to be reported by children to their class teacher.
Children will see a 
button. When clicking on this they will be notified that they are about to report the inappropriate comment or post. 
If a child proceeds, the class teacher will be notified of the child's reporting request.