I also have experienced all of the same with teachers... it never ends... they never even come close to understanding.
A couple weeks ago my dad was at a doctor's appointment and happened to bring up how he has 3 kids with N and life wasn't going too well for one of them (me). The doctor told him... He is sure that no one really has N... they're all just hypoglycemic!!!
My mom told me and I said "Wonderful... everyone on NN will be so happy we're all cured now!" LoL
That whole thing made me pretty upset, because my parents are struggling with the whole "I don't believe in N" thing already... so now that was another setback.
Oh well. I guess all we can keep doing is educating people like we are. I explain it to anyone who will listen, because if we don't explain it they'll just have some weird understanding that is incorrect. I think it's a pwn's duty to explain N as much as possible. Maybe someday other pwns will get less of this stuff from the public if we do enough to explain it now.