I realize the question is facetious. But when something like this happens, the question should be "You mean it's illegal to climb the Mackinac Bridge on your own? Well, sure, but that didn't stop someone last week from doing it.
A government related auction site might just have the ultimate Michigan gift. Christmas, birthday, doesn't matter. This item screams Michigan. You can now own a piece of Michigan's most iconic monument, the Mackinac Bridge.