Give me £20k a week and you can call me whatever the f*ck you like!
With regard to the issue of groaning and moaning at players, most of the time its an instant reaction to the players touch etc... its not like were singing he's a c*nt for periods of the game!
I have called most of our team useless twats over the years but mostly in a moment of frustration at an inept performance, I'm not sure what somepeople expect? perhaps a polite "Never mind son, maybe next time" and a shrug of the shoulders?