49. Get your anime-crazy friends* to cosplay the most annoying characters they can think of, naturally during rush hour. (It would work better if they find their friends, who find their friends, who bring their friends and then you have an entire group of crazy teenagers taking over the McDonald's!!!)
*Note: I only put anime-crazy friends since I thought of my friends that are into anime, because they cosplay a lot. Once, they went so far as to walk into the Dairy Queen and start singing a song from the show! I'd wnat them to be some of the conspirators for this, naturally!
Your friends don't necessarily have to be into anime to attempt this