It seems you need to prove you dont need it. Guilty until proven innocent.
I see what you're saying, but you're not quite correct. You're not guilty until proven innocent, the system is built on an assumption that people require a tv licence as the vast (over 99% of the population) do. The responsibility is then placed on somebody not requiring a licence to bring this to the attention of the licensing authority as a matter of general public importance. This is not guilty until proven innocent, it's simply placing the burden of proof on the member of the public, you are not declared 'guilty' unless following the due process it can be established that the person claiming exemption is in fact breaking the law. There's a massive difference between shifting the burden of proof (something that is done in vast amounts of legal circumstances) and being guilty until proven innocent - if it's the former it's legal in various circumstances, if it's the latter it's in breach of both domestic and international law.
And that said, yes I agree that the licence fee should be abolished altogether - the BBC is already a commercial station, they just don't have revenue from advertising - they do however make millions from commercial sales of their programmes (Doctor Who for example) to both foreign nations and through dvd sales and merchandising. In this day and age to have a compulsory license fee for an organisation that can legally make as much money as they like from various other avenues is simply disgusting.
Sky on the other hand, people may say it's expensive, others may say it's not - it's all a matter of individual personal circumstance whether that's the case or not - NOBODY can legitimately say that it's too expensive as a broad statement as it's literally impossible to qualify. For me it's affordable, but for others it very well might not be. I just wish people would stop saying that they're 'paying £30 a month for one channel', because they're not. They're just not. Like it or not, it is £30 a month for a LOT of channels. Yes there's a lot of crap channels, but there are also a number of channels that are simply excellent. Ultimately though people have a choice unlike for the BBC, you can buy sky or not, that's a choice you make given the overall costs and your overall circumstances. Either do it, accepting the terms and conditions or don't. Don't buy it then moan, because that's what you have agreed to, and don't NOT buy it and then moan, because you can still watch many races for free on BBC and the rest with extended highlights - if you DON'T buy it and still want to moan then the correct establishment to moan to is the BBC as it was them that sold out when they still had a year on their contract - NOT sky's fault for then buying in as they had every right to do so.
Favourite racing series: F1, Indycar, NASCAR, GP2, F3, Formula E, Trophee Andros, DTM, WTCC, BTCC, World Endurance... etc. etc.