"TV is where people often look for expert or authoritative opinion."

If they do they are deluded. The days of impartial, informative TV are long gone, if they ever existed in the first place. Is the bias on TV fairly modern or as access to the internet revealed 'factual' TV programming for the sham it is? TV is full of junk science and opinion masquerading as fact. The hideously bad BBC Panarama episode on wireless networking springs to mind. It seems to me TV is just like the internet, the bloggers just have bigger wallets.