Ah, yes - also Benefits Street and Wife Swap and many others. The whole idea of these programmes is supposedly that people are watching because they want to see the resolutions, when people stop warring and find respectful common ground; and people who do outrageous things learn how to behave much better.
In truth, of course, viewers only watched for the drama; and if anything, I bet the viewing figures for the later episodes - when the subjects had taken on board the error of their ways and transformed - were far down compared to the earlier ones with all the drama.
The TV makers would always keep upping the ante for more shock, though. The first couple of series of Big Brother were genuinely great - where the point of it was that they were ordinary, everyday folk in a very extraordinary situation. Inevitably, it didn't take the producers long to completely defeat the object of the experiment and dump the ordinary people in favour of the grab-your-popcorn, short-tempered 'characters' - often not especially bright or well-adjusted - who were all about the drama.
Then, when that got boring, they too were chucked out in later series as the producers actively looked for seriously broken people, for whom the very, very last thing they needed was to be paraded on national TV for the general public to judge them and vote them out (or keep them in if they were a thrilling enough 'freak show').
I'm sure I also read that they later showed the UK Big Brother in South Africa and had the public there paying to vote for whom to keep in or be evicted - way after it had all already finished and the results decided and winner crowned long ago.