It's highly unlikely that this is the work of a single individual since it requires art, sounds and code. A group of employees were in on this little easter egg. They got sloppy and disabled it instead of removing it altogether before the game shipped.

Hey ATI, how about improvements in games people are actually playing like BF2?

Ditto... the only thing i don't like about clans is the seriousness of it all. NO, I'm not going to be able to schedule set times of when I'm able to play. NO, I will not book time off work or ditch my girlfriend to play. NO, I'm not participating in any tournaments. I just want to have a fun time playing with people that are easy going and interested in using some strategy.