If it were done to be silly, I’d say whatever. But for PC reasons... I don’t know. Kind of a strange way to go about it.
According to the quotes in the article, this was done in absolute stern seriousness and it is being defended as being the very best solution that they could have possibly come up with.
Apparently, leaving out photos featuring children was either not considered or they honestly didn't see anything wrong with covering up the students' faces in such a garish manner that has served to put this school on the international map for all the wrong reasons.