These people are known as Festival Nazis
Friend: "yeah definately, we should get all of our friends to come, it will be great"
Festival fever sufferer: "wow they're going to that festival, we should go to"
Festival fever sufferer 2: "yeah, but aren't we copying them"
Unrelated person: "some people are going to this festival, it looks like good fun, lets just go for the banter"
Unrelated person 2: "yeah, Banter!"