Are you convinced that just a handful of Reddit communities stir up the majority of trouble? You now have some data to back up your theory. Stanford researchers have released a study showing that just 1 percent of subreddits instigate 74 percent of all intercommunity conflicts on the site, including raids. The team analyzed 40 months' worth of Reddit comments and posts to look for negative links to other communities, and tracked the virtual brawls that followed. The paper doesn't name every group involved, but notes that the conflicts tend to be sparked between groups that are diametrically opposed to each other on controversial topics, such as conspiracy theorists and documentary fans.