I've learnt from them, him and some other very good snipers. (I only play sniper, and getting ok in it.)
I'm at least getting my own back on them now. Once you know the maps inside out then you find some very good spots to hit and get awesome shots in. Best map for sniping in my opinion is "Road to Jalalabad"
I love that map
oooo and that guy called Wizard@sniping = Just as annoying.
I have noticed that once they take a spot they hardly move from it. If I spot them and the didn;t see me, I get around them and take them from another side. Works sometimes but most of the time I get raped by some Assault guys /cry