Similar to a Lord of the Flies
theme that always seems to run through BB too - whether it's the "plastics" versus the "real" housemates or Heaven versus Hell. It's human nature for any group of people to divide eventually and align themselves with whichever group will benefit them most.
Can just see Rex as Jack in LOTF. Spolit, controlling little rich boy with a sadistic streak. And Darnell as his psycho side-kick.