lisalisa, what a dreadful shame for your DD. I too have issues with similar things at my DDs independent school which is very academic and competitive, with a definite 'alpha' stream of children (and parents) who get in the top teams but ALSO get all the lead parts in plays, win all the cups etc.
Not sour grapes, I'm sure some of these children excel in sport, drama and class but it wouldn't hurt the school to spread some glory around.
BBe and cargirl make some very valid suggestions, like you I just want to let rip!
My DD recently got a demerit for working slowly, untidily and not bringing the correct equipment to a lesson (she's in yr 3) SHE HAS DYSPRAXIA FFS! But the head did them ask her to help clean up the art room (which in itself sounds like a punishment to me) and gave her a merit to make up for it, but she was heartbroken as she has to work hard to be average within her class and rarely is rewarded for effort.
Good luck take some deep breaths and I hope you can get a suitable solution - like could they set up a situation where she is awarded enough points.
I like the idea of honking your horn to dissipate some anger!