You can ask, "Which of the 8 functions and/or combinations of the 8 functions could cause a desire to cheat?" and use the answer to that question to discern a type that is more likely to cheat.
So long as you don't say "All ESxPs will cheat because of their dominant, impulsive Se, and you are an ESxP, therefore you will cheat.", then there's nothing wrong with trying to apply MBTI to certain tendencies and behavioural patterns. MBTI is not an inarguable end-all-be-all, but it is certainly a method of making fairly accurate generalizations. As long as you are open to changing your generalizations based on discrepancies in individual cases, then MBTI can be applied to lots of stuff.