Chair Entertainment may approve of players sequence-breaking Shadow Complex, but it does not condone cheaters who "compromise our game". Microsoft's Xbox Live team will be going after dishonest Shadow Complex players, banning them from leaderboards and deleting their Gamerscores.
An official statement from Chair and the Xbox Live team sternly warns verified Shadow Complex cheaters that punishment is incoming. Beyond leaderboard deletion, that means a Gamerscore reset across all games and a public outing as a cheater on Xbox.com and the Xbox 360 dashboard.
A message to the Shadow Complex community [Major Nelson]