I know of a uni who did a similar thing to their first yr students training to be teachers, except it was pictures of them drunk, or posts that included references to sex, alcohol etc. The point was to drive home that parents, kids and future employees could and will seek out profiles.
I know there's a difference in such that these students were adults, but the fact remains that if you use social media to share information, there is the possibility it could end up in the wrong hands.