Along with Zuckerberg, Mahalo founder Jason Calacanis and TechCrunch blogger Michael Arrington also would have appeared to have professed a sudden interest in young boys, thanks to pranksters on their (very long) friends lists. Deliberately shocking as the NAMBLA group may be, these additions highlight what’s arguably a shortcoming of Facebook Groups: Any Facebook user can go ahead and add any other user to a Facebook Group without any consent on the other user’s part so long as the two users are Facebook friends.