i actually first heard about people using modded controllers during a game on live, 2 people were talking about how they use their modded controllers to change a semi auto rifle to fully automatic, some shit like that.
i think its sad that people need to cheat to be good at a game, me personally i cant get at least 20 kills a game without cheating, that's close to 1/3 of the total score to win, but with online gaming there are always cheaters, i've seen the modded controllers online and on ebay, the cost is more than a year of live just to cheat online, people even sell General accounts for Halo 3 on ebay. Cheating should be left to PC's not gaming consoles. I hear people even hear for all you can quaff in castle crashers, thats sad indeed. real sad.