True Russian Orthodox Church
The True Russian Orthodox Church was founded by Pyotr Kuznetsov who taught that things like credit cards were evil. But in 2007, Kuznetsov convinced about 30 followers to go into a Russian cave until the year 2008, when the world was supposed to end. Interestingly enough, he didn’t go with them. But after two cult members died, people started worrying about the unsanitary conditions and left the cave.