I hate the whole deal with genre, whether it's organising your collection or just trying to classify a track/band. The only time a genre label is useful is to tell you to turn left or right when entering a music store.
Check out the 'favourite metal' thread. People argueing (politely) about who comes under which category.
Also, when a band is placed into a certain genre and then releases an album that doesnt fit within that then people moan. London Calling is probably the best example of this. 'I hate London Calling, it's crap, it's not even punk.'
You can choose which one to sit on