Um, nothing. The BBC have an operating budget of £4.26 billion. Now, let's say ten million households decided to boycott the BBC. That would mean that they would lose one quarter of their budget, which is not a significant amount. It might be effective, but the only way it would have any impact would be if those ten million households stopped watching television altogether - because as Famine keeps pointing out, you cannot watch television without paying £145.50 to the BBC, and by extension of that, you cannot boycott the BBC and watch television at the same time. I come from a country on the opposite side of the world - so far away that you cannot go much further before you start coming back - with no such regulations in place, and I understand this better than you do because you seem to think you can lead the masses in a Che Guevara-style uprising to protest the sale of the broadcast rights to Sky Sports.