What is the best way for Big Brother to educate people?

Big Brother has a fantastic opportunity to influence and educate millions of people about racism, bullying and class issues. I believe it can do this by educating the housemates while they are still in the house, not after they are evicted. With so much footage, the process and dynamics of the underlying influences and motives can be shown in numerous ways.

For example, bring Jade, Jack, Jo and Danielle to the diary room, show them their derogatory comments and actions and draw out their intentions via gentle questioning, whilst secretly showing this to the others housemates via TV, so they can see the whole thing for the first time and reform their opinions.

It must be done sensitively so as to humble and help the housemates, and not to humiliate them. I think it's a great chance to change the negative attitudes of housemates and also their peers at the same time. But what is the best way to go about it?