Here's a fascinating article on a group of potentially undiagnosed schizophrenics who meet online, believing that they are Targeted Individuals, attacked by influencing machines designed to control their minds which invoke schizophrenic-like symptoms. Yet the spread of their concepts manages to undermine the less-visible psychiatric interpretation of this phenomenon. Interestingly, the fact that these TIs can share their "delusions" together implies that the delusion is not a delusion, because a delusion is categorized as an idea that is not shared by the person's culture or subculture. To quote a study in the article, "the internet may enable complex support mechanisms without reference to a view of reality held by the authorities or even the mainstream of opinion." Yet, the mainstream reality and TI's beliefs have never been closer together as the TIs have more and more things in mainstream reality to point to (FBI's COINTELPRO, CIA's MKUltra, popular films and TV, etc.). More inside the link.