Some of the greatest sins for which we are judged are not in us performing the acts ourselves but in us not restraining those we know who are performing them. The judgment is the same. So the next time you think "I have not sinned" think back on whom it is your responsibility to restrain and have not.
kjv@1Samuel:3:13 extends sin to include those knowingly do not restrain others from sin. Here in kjv@1Samuel:3:17 we perceive a further guilt to those who have been given a special revelation of knowledge from the LORD and withhold it.
As compassionate and polite as the young mans plea to Job seems to be, it seems to be built of a similar argument; that Job has something major to repent of and that he is adding to it by not repenting, God doesn't just do this without reason, without one deserving it so the theory goes. There is also the notion that by contending with the counselors that haven't this problem that Job is somehow contending with God. We start to see how many forms the same argument can take on.