Just a bunch of kids who don't know anything about it. Maybe all the wrong messages on the internet seem to be awesome. Non-mainstream is an alternative meaning unacceptable to the public. Many people don't know what non-mainstream clothes are. To put it bluntly, I just like killing Matt. More than half of the pictures named as non-mainstream are either non-mainstream or stolen and uploaded by Matt. The word "killing Matt" was invented in 2007.