I've don't watch TV (well, occasionally CNN when in some far flung hotel room) so I am not qualified to make any judgements on the Channel 4 Big Brother racism allegations. I haven't the faintest idea who these "reality" celebrities are and, it would appear, I am better off being enveloped in ignorance of such programs.
My take is more on the fact that Channel 4 is apparently a partly government 'sponsored' TV channel, so to name a program Big Brother seems to be totally correct. Given the number of CCTVs in the UK, the government is Big Brother. It is they who watch citizens while the citizens think they are watching Big Brother!
George Orwell, Aldous Huxley, where are you now?