The Dork Knight himself.
Changing the aspect ratio isn't necessarily a no-no so long as the engine supports it natively and the results don't squish the players/world. A slight UI squish is tolerable, but not the entire video.
http://www.youtube.com/watch?v=wJUvIJMQIbo
http://www.youtube.com/watch?v=utLIe8QNSiM