So a Mark = Fan, whereas Smark = Smart Fan. They're called Mark because it's something from the old carnival days of the 1900s where the carnival folk would "mark" potential people to get their money from. A Mark in wrestling can generally mean either that it's someone who actually thinks wrestling is real, or otherwise someone who overreacts to wrestling in certain situation. Everyone who is on WrestlingSmarks is a Smark, which is a more definitive term meaning a fan who understands the storytelling aspects or the inner workings of the business.