Great Question. It depends on how bad of a violation they have committed and where you are in the chain of command.
If what they have done is a one-time incident or very minor in nature, a butt chewing is in order for the NCOs. The unit may need to hear a talk about respect. Consider having the NCOs conduct the class as corrective training.
If it is more serious or if it has happened more than once then you can bet it is a behavioral problem they have had for awhile. In this case I would recommend at the least a strong counseling statement given by at the platoon sergeant or platoon leader. If the acts were very serious or if they have happened many times, I recommend a local letter of reprimand. This is the point where a comment could potentially be made on their NCOERs.