Well let's investigate :

http://www.quakelive.com/#leaders/details;view=ACCURACY

Not too many after all. Many clowns like "RailgunCannon" (using only shotgun so 70
% accuracy)

Poros1ty does'nt cheat, he is really impressive.

and

"tiest0s" seems to be stermy :

http://www.quakelive.com/#profile/summary/tiest0s