How would you react to an E2 who "smart mouths" you in formation?

Well first I have to say, I was always the Soldier to disagree with Madan task. Never in front of other soldiers but off to the side. I was very fortunate to have a squad leader who understood my disagreement. I never questioned a direct order. But we have all had the daily task of BS. I never tried to get out of doing work but if I could make it easier to complete the task with less men ,so others could have down time I did.
So when I became a Sgt. No one questioned me because they knew I had already broken down the task and what was left had to be done. I believe if I ever had a solider disrespect me my other soldiers would have had a little talk with them.

I've dealt with this and I'm a Specialist not an NCO. I calmly remind them that I told them to do it and that things could be worse. Now I have it a little bit easier though all my orders are backed up by my squad leader and my platoon sgt. Usually when I have to delegate details or jobs it's because my squad leader is away. So if it continues it goes straight to a SFC. I have no pitty for those who get on his bad side.

I'm old school Navy so he wouldn't of been standing in formation for long and would of been picking his ass off the ground. Today's Navy would of been counseling.

I would give the rest if the detail out then woodline counseling.

Take them to the side and tell them that if they don't fucking do it they'll be cleaning heads for the next 6 months...with their toothbrush.

Punching them squarely in the face would get the best long term results. Others would think twice before doing something so stupid. The downside is the jail sentence. Might be worth it, though.

wait for all to leave then ask why this E-2 was being lippy give him every opportunity to explain

I would smoke that ads

Are you the LPO? If so, Counseling Chit. Written out ready to submit. Have a meeting saying this is going in unless you can tell me what is up with your public pronouncements? If they continue with the complaining submit the chit. It appears that your E2 feels like they made a bad decision joining the Navy, or perhaps there are other unknown issues. It requires some research prior to dropping the hammer. You should seek the advice of your LPO or Chief. This on-line stuff is nice, but your LPO/chief can probably provide better advice.

After reading through the comments a bit I noticed something of a trend. Why do Army Personnel go straight for the Article 15. I was trained throughout the Navy that sending them to Captains Mast (article 15) means that I the supervisor could not handle the situation at my level. Depending on the severity of the disrespect, i would tell said individual, to standby by after Quarters ( formation) for a "Discussion"and get the LPO (senior E6) to observe my counseling . If the offence is severe enough, I would have to make an example in front of the work center ( squad ).