"On the other hand, if the cheater is going to get found out by his lack of skill, he won't achieve a reward and his cheating is irrational and self-defeating,

"On the other hand, if the cheater is going to get found out by his lack of skill, he won't achieve a reward and his cheating is irrational and self-defeating, and not something we need to worry about. It's self-punishing behavior." The impostor will still gain a privilege from their ill-gotten degree and claims of expertise in a subject, even if the coding-related job screens them out. Those charismatic persons may also receive their jobs because of cronyism/nepotism, their lack of skillset given a pass because of the credentials. Worry is a loaded term. I didn't worry about the cheaters when I was getting my degree, but I would still prefer to see them removed from the system, once found.