Ballet and rock music are mutually incompatible. The latter degrades the basic qualities of the former.
I'd partly disagree with you there. From what ballet I've seen, there appear to be two types: your traditional classical ballet where everyone is smiling and everything is extremely graceful, and the more modern ballet, where the movements, while still ballet, are stronger, and the sets and costumes are not what you would expect in a traditional ballet. David Bintley's 'Carmina Burana' for the Birmingham Royal Ballet comes to mind here.
For the first type of ballet then I agree that rock music would not be appropriate at all, but for the second type I believe that it could work. Using 'Carmina Burana' as an example again, the themes and ideas brought up in the work could easily be put to rock music, and while Carl Orff's well known score is technically classical music, to me it has the volume and emotion of many a rock tune.