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

Pvt DA and his team leader stand fast after formation. Opportunity to explain and in the extremely likely event that there is no adequate explanation - nip this in the bud quickly with extra duty and a counseling statement

Tell him that if he doesn't like it then he can change the policy when he out ranks me, and to do it anyway. Then tell him that if he doesn't do as I have instructed him, that he will be reporting to me in front of the First Sergeant.

Ask him to correctly breaks ranks and get the fuck out of my army...send him str8 to platoon srg for immediate discharge....because if he acts like this in the states...what u think he gonna do over seas

I will ensure to have that Soldier standfast, after finishing out what is needed to have the rest of my troops actively engaged I will return to the situation at hand with such Soldier. I will first start by inquiring if the SM had anything pressing going on that the leadership (myself) isn't aware of, whether it be financial, work related, home, substance abuse, alcoholic, etc. If it is such a situation where he/she does, I will ensure to handle it at the same time also ensuring the SM that his/her actions doesn't go unpunished...engage the SM with such a corrective action that he/she won't forget to loose their military bearing again.

I would smoke his ass

Slap the puke grass party after then restricted to base

Throat punch..lol

Line train .

Put him/her on report

I thankfully only had one instance they got close to this and it was after I had plenty of time in leadership positions.

While underway my partner (undesignated AN) and I were roving the ship and came across a deck seaman chipping paint in a p-way. We always carried ear pro on us and put ours in as we needed to pass through the space. As we did, I noticed the seaman didn't have any ear pro at all, at least he had safety glasses. I tap him on the shoulder as we pass by and signal that he needs plugs or muffs while chipping. He half nods and mouths "whatever ". My partner and I continue on to ththe hangar bay door and wait. My partner steps through and I continue to watch said seaman. He looks up at me and I motion again for him to get hearing protection, he just goes back to chipping. Fast forward, my partner takes some foamies to the kid who motions "no thanks" an we escort the kid to the hangar bay. I'm talking to him and he's just bobbling around looking at the bulkheads, the deck, everywhere except at me. So I brought him back to boot. Back to attention, yes Petty Officer, no Petty Officer, that stuff. We taught him the rank structure again; the chain of command; lawful orders. After that was done, we went and had a friendly chat with this kids LPO, and then the ship She safety LCPO. We brought the entire ship down on this kid. I saw him two weeks later mustering with the restricted sailors for extra duty.