Most of them are downtrodden people who are easily manipulated. In Jonestown and in the Heaven's Gate suicide, the leaders telegraphed what they were going to do. You say you've seen this type of thing many times before. Many governments do keep an eye on these groups and do step in. But here there's too much freedom.
Some people still glorify psychotics and schizophrenics, saying they are unusual, gifted people.
But psychosis is hell. And if you're going to save lives, somebody had better interfere. Because these ill people do telegraph their messages, and these messages are a cry for help. You see it when you treat the illness in the individual. And you see it in these cult leaders.