It's probably because this particular approach serves mainly to highlight the school's policy as well as the rampant scourge of pedophilia, and in so doing detracts from the students' achievements which the pictures 'should' have been there to promote and celebrate. Instead of being able to proudly point to the newsletter and their achievements, the students' garishly-altered photos are instead mainly a reminder that they are under scrutiny by sick perverts and are led by a faculty that is apparently unable to come up with a more dignified and thoughtful solution, such as adding password protection to the site (as suggested by dead in post #14) or simply not including any photos at all featuring children.
Did they really believe parents wanted to view those pictures in that state? Besides, online weirdos can still check out all those exposed kid-knees for their jollies.
And what are we going to do about kids who traipse around town without their smiley masks on, in full view of a whole world of predators?
Hiding the faces of innocent children because of the threat of molestors is akin to the burkha solution to lust for women. It's a bit overkill, to say the least.
I’m in complete agreement with you about it better to not post any photos under this policy for the reasons you stated, I was otherwise just relating it to my schooling experiences here in NJ last decade.