I only graduated high school only three and half years ago and people were all over each other everywhere in the school and no one said a damned thing. No one cared and it didn't make education any more distracting. And we're not talking some sort of ghetto school--a good, suburban school with mid-high academic standards. And you can't argue professionality in high school. The super in that article even called it a "campus." How pretentious. Campuses are for colleges.
Half-hugs (that's what we'll call it, based on the description in the article) aren't PDA's in the least, especially not between thirteen-year-old girls. Who is being hurt by allowing girls to hug? No one. Who's being hurt by punishing them? Well, no one is "hurt" but inconvenienced for no reason.
dunno, /rant