We should probably just wait up to a year for the game's release. If people did find a way to pull this idea off, some of them might use Mario Maker very immaturely, and cost the game a possible online capability update. We all know how uptight Nintendo is about people running exploits, modding, and even doing simple "hacks". I'm sure they get tired of having to patch so many tricks and shortcuts, so upsetting them just might put this game in an even worse position.
And really, with so many troll courses, inappropriate levels, and game-breaking glitches discovered, I really can't blame Nintendo for holding back. Many players need to stop pushing the envelope, in my opinion. It just takes the fun out of the game.
But at the same time, Nintendo needs to be more openminded.