I disagree with them.
I'm all for caps - I like my service nice and fast, without the 24 x 7 bandwidth hogs who feel the need to download the entire internet each month. Caps are the obvious way to limit such people - and if it drives them away from ntl then even better.

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Well passing lightly over the fact that you have no proof that anybody's internet connection has been degraded by other users downloading 24 x 7, this attitude is utterly astonishing. The only possible excuse for you is a vested interest in ntl's profits.