If they do kick you off, can't you just go with another provider or do you have to pay your contract in full (12/18 months?)?
Well its technically a breach of your contract so you'll have to pay your contract off. Why? Have you reached your 3 warnings?
They are not accusing you of illegal downloading (even if thats what you are doing
)
Iplayer, steam, xbox live, PSN, youtube etc all can contribute towards 'detrimental use'