i know a few people who were completely thrown by brody at the end and they thought the hills was completely fake :L
it was SEMI reality. therefore as lauren said when she quit, 'any place you live has to be able to fit cameras, every place you work has to allow cameras in' etc.
so they live there lives as they should, but many things are limited.
EG Brody has been in a relationship with Avril Lavigne for over a year? But Avril has never even been mentioned in the hills.. eek