cold fjord writes: Most people on Slashdot probably have read comments somewhere on-line that they thought were crazy. It turns out, they might be, and use of social networking sites may be a contributing factor. From the story: "In his study, the researcher presented three in-depth case studies linking psychotic episodes to Internet communications from his own practice. According to Dr. Nitzan, patients shared some crucial characteristics, including loneliness or vulnerability due to the loss of or separation from a loved one, relative inexperience with technology, and no prior history of psychosis or substance abuse. In each case, a connection was found between the gradual development and exacerbation of psychotic symptoms, including delusions, anxiety, confusion, and intensified use of computer communications."