I don't think you'd ever get a "united house", all deciding to a man/woman to rebel. They'll always be some in the group who think, "stuff this, I want to win". So whilst a rebellion may start off convincing (think PJ in BB3), others not so dedicated to the cause will soon back out. Thus you immediately get factions, and the revolution is dead. No-one wants to revolt on their own, or even banded with 2 or 3 people.
After the finale of the 24 hours, we are all conformists. And so it willl be in the BB house.