How did Olson's group manage to rebel against Babcock's influence? I thought everyone in Haven had completed the dream sequence and become thralls.
They were under his influence but not under his control. Babcock left his foodstock mostly alone. Though he states that he's dominated everyone he telepathically contacted, presumably he was talking about the people in the prison, who he'd use as his guards and governors, and not the general populace.
Otherwise, giving in easily would probably give you more mental freedom then if you resisted and had your mind assaulted and broken, since everyone shows evidence of being "touched" by Babcock but have varying levels of independence.