Gamestop had a streak of really awful ads going about two years ago.
http://www.youtube.com/watch?v=oHpzHbWYTi4
http://www.youtube.com/watch?v=5IdvV3V9oOQ
http://www.youtube.com/watch?v=60rh5OP2bik
There are more out there if you want to hunt them down.
I dont think there's anything more annoying in the world that the "Gamestop dude" voice at the end of each of these.