Of course, with a simple switch of this brain implant's polarity,
you can take a perfectly happy, well-balanced person and
murder them with a crushing wave of electronically induced
unipolar depression.
Good thing they didn't have these gizmos in the Soviet psikushka
days; what a great way to sideline and eliminate political
activists. "I dunno, man; the cops took him to the prison hospital,
and six months later he suddenly went all moonbat on us."
http://www.guardian.co.uk/science/story/0,,1743846,00.html
