In the land of Equestria, there exists one major concept that took place during the period when Discord's reign came to an end by Celestia and Luna...or would have been if not before him enacting a law that not even the two Sisters can change. The rule; while simple has been the constant downfall of many important things; Starswirl never invented his signature spells, The Wonderbolts never existed. And the worst of the worst; nobody cared.

The rule is this; if you want screw up someone's day, then just go for it. What could be the worst thing to happen?

Well, just ask Spike.