Government mind control is the stuff of conspiracy theories. Many homeless people suffering from schizophrenia or meth-induced psychosis claim to be victims of it. And it is common to find people online who say they are victims of mind control, directed energy weapons, and gang-stalking by government agents. These delusions appear to have arisen after evidence emerged in the 1970s that the CIA was engaged in mind-control efforts, the subject of a congressional hearing last week.