oh please. cheats exist for the sole purpose of being used and exploited by the saavy game player. i mean, who the fuck is going to turn down a car that floats on water??!?!
I haven't played video games since elementary school, because I knew that if I continued, I would very well still be finishing college into my early 30's.
But cheats screw up your game. If you get 100% completion... you don't get the special bonus secret mega surprise. Of course, about the only way someone is going to hit 100% in that is with a Codebreaker so it's sort of irrelevant...