you know....there is probably someone out there who has done it. And while I am a lowly 1K, I can't imagine that happening.
Think about it......you will be bumped only if no seats are available. But, if there is a bus load of tourists trying to fly out on your flight.....bus breaks down, and 50 tourists are stuck on the side of the highway 50 miles away. chances are that there will be seats available to accommodate you.
So, nope.....I don;t think so.