[andygrif]

I think as long as the terms are laid down clearly when you enter into them, then it's not a big problem to me. If you enter into any complex agreement such as the provision of broadband only by taking into account the headline offer and not the T&Cs then you would deserve all you got.

If you are a heavy downloader then I would expect you have read the conditions, decided against signing up and paid another ISP that did not ask you to be a considerate downloader.