The most used and abused media is Social Network sites in recent times. School children throughout the world are now-a-days encouraged to use SNS for education purposes. Therefore it is believed that local regional school children generally use particular restricted forums of SNS. While usability plays an important role for school children to opt for SNS so as to challenging and communicating with fellow students and friends, they become highly vulnerable to predators, that has had designer to concentration on security aspects. This paper attempts to arrive at preferences 5 selected network security mechanisms that are analogous to communal aspects of usability for children users belonging to restrict the results have been arrived through scientifically designed social study forums of South Indian SNS users.