Did you ever cheated in games?

Everytime.
Cheating in games extends the game's replayability.

After I beat a game, I try to develop my own exploits and cheats. Its always a cool challange, with great results.
Being able to see how the game's code was thought out, and how to break it is really enjoyable.

Hacking in games only turned into a taboo recently, back in the day games came with their own cheat codes. Thats the reason games like GTA San Andreas are so enjoyable.