I understand where you are coming from about yogg+0, however, I will present this:

Did you SEE the list of griefing actions ON YOUR OWN TEAM that Allison listed? You don't have to deal with that with Yogg+0. Sure, it's difficult. And comparably easy to cap a tower or return a flag. But what makes School of Hard Knocks very evil is that, especially towards the end of the week, people start getting desperate, and at that point the PvPers are pissed that their BGs are "ruined" and it just turns into a huge mess. You have to queue and requeue and hope beyond hope that you get lucky and get into a BG filled with mostly nice people. And come on- you play WoW. You know that there are a LOT of mean people, and you also have to know that they're probably all queueing for bgs just to mess with the achievement-seekers.

Yogg+0? You're probably not dealing with that. You are probably dealing with a guild that is trying to work together to down it. So, yes, it is extremely difficult and even hard to find a lot of people who want to try it, but it's still not anywhere near as evil as School of Hard Knocks.