as phil said, i am the youngest instructor in our club (
www.rcflyers.net).
i am 18 now, when i was new i was met with a lot of sarcasm and arrogance, theres still one there thats a bit of an idiot but i seem to have a lot more respect now.
if a new guy with a plane turns up with a plane they are directed to me or phil , whoever is there at the time. they do tend to learn quicker with phil, i think hes got some tutoring tricks up his sleeve which i dont know about!
just ignore the tossers and do what you do, keep doing it and you will have the respect you deserve in no time, trust me, ive been there!