Scooby-Doo Where Are You! premiered on September 13, 1969, and since then has grown to become one of the most iconic and beloved cartoons of all time. Spawning multiple reboots and a few movies, Scooby-Doo isn't going anywhere. Unsurprisingly, fans continue to discover hilarious and often interesting things about the gang, and we can't stop thinking about them. Here are some of the best posts shared by fans about the Scooby-Doo franchise we never thought about before.