Ohio’s Free Times has an article on people who believe they are being targeted by top-secret mind-control technology. They regularly lobby government to legislate against such technology, while others claim they are, in fact, experiencing psychosis.
Although distressed, many of the people who have such experiences do not seem particularly disabled by them and are able to run their lives quite effectively, even creating complex websites to make their case.
This, and the fact that many believe that these experiences are due to top-secret technology (which, by it’s nature, can’t be checked out) means that these experiences are not clear-cut signs of psychosis, despite the fact that they resemble some experiences found in people with schizophrenia.
To muddy the waters further, people who are very likely to be mentally ill and experience similar things are likely to be also part of online ‘mind control’ communities (as mentioned previously on Mind Hacks).
Meanwhile, proponents of the existence of mind-control technology point to the CIA’s MKULTRA project which genuinely did test (mainly drug-based) mind manipulation techniques on unsuspecting members of the public.
This leaves a huge grey area for the DSM diagnostic manual, that defines a delusion as a belief that is (among other things) false. In this case, it is difficult, if not impossible, to find out whether beliefs in secret mind-control technology are true or not.