Very related linkI really do like this thread... but one thing needs to be added (subsection of mind control, maybe).
Brain washing~!
By application of simple psychological principles (simple to employ, but bound up into human nature) people can be made to do almost anything.
Take Patty Hearst, for instance. Daughter of a wealthy businessman, she could have had anything she wanted. Smart, and with a bright future.
Until she was kidnapped.
She is then forced into helping a criminal/terrorist group rob a bank (Capital One Bank, formerly Hibernia Bank) and a few other things (I think... don't remember her story too well anymore). At first she resisted, but by the time they were "done" with her, she was a political activist who hated her upbringing, her family, and everything she'd ever stood for.