I guess it boils down to the simple question of "do NT's talk behind our backs?" and the answer is, yes they do, all the time. I probably shouldn't talk about this but this is something I used to do back to my teenage years. As you know I'm an electrical engineer and one of the things I used to do was phone tapping as well as put hidden microphones in rooms, that said. NT's will say some of the nastiest things about you behind your back when they know you are not around. And believe me, it's quite painful to listen to some of the stuff these people have to say about you. This holds true for everybody from students, teachers, bosses, co-worker even business acquaintances. And the part that hurts the most is knowing that there is very little, if anything, you can do about it