Ok, so now that McDonald's has re-invented themselves to include wi-fi and a decor that seems vaguely Starbucks/Panerra like, perhaps this McDonald's Rap
isn't so far out of the question.
But some classics can't be improved upon, like these McDonalds Menu Prank
and The Great McDonald's Sign Prank
demonstrates. And another link from the recycling bin is the always fun Ronald McHummer Sign-O-Rama
where you can create your own McDonald's sign board and protest their endorsement of the Hummer all at the same time.