I'm a Brit, vehemently anti-ad, but am not a fan of the BBC, and don't support it (financially or otherwise).

It may have made some sense back when it was the only broadcaster, but now that it's one of many, and there are proven alternatives for ad-free (e.g. the HBO subscription model), I can't see any justification for continuing to force people to pay for a channel they don't like and don't use.