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

I would begin by dismissing the rest of the crew and have the LPO and the offender stand fast. Then I would lock heals and have a serious conversation about how to behave at quarters, what I expect from an LPO and then I would provide detailed instruction to both, loudly and distintly (so there would be no mistaking my intentions) on the meaning of lawful orders. I would include information on the UCMJ, and provide detailed description of the brig and the conditions there.Then I would dismiss both individuals and expect that the work would be completed.

Press charges for insubordination and get them out of the military ASAP. In the old days you may have been able to get that piece of crap inline by beating his ass. No more though.

Well guess I'm old Army. After I put him on the ground and on restriction for all to see. Prevents insubordination. When we are alone I would then explain harsh response and question him. Sorry, my time women were not in the ranks.

Have him report to the 1st Sargents office for a company grade

Lol! Anyone who has served,knows how this will work out,in the real world,disobeying a direct order,can lead to a very bad consequence!

If you're in the navy you have a private conversation and a counseling session. If you are army infantry you out this kid in the front leaning rest, re-assign his task to his team and make this kid do all manner of strength and conditioning exercises until such a time he is ready to re-join his team and take over those duties. He then gets assigned all of the crap details for the days, weeks or months ahead until he has proven to have corrected the error of his ways. The proof would be when his team approached me and to call off the fire or when his team started jumping in to help with his details.

Full On DI comes out. I'll would Darth Vader choke him out. "Since we cant touch them" then after ripping him a new asshole. Get him some nice EMI authorized by the CO.

I'd all over their ass. If they still didn't respond, he/she and I would have a discussion with the platoon sergeant, and i push for at least administrative action if not an article 15.

Lock up his heels in front of the C.O. and let him explain to the CO why he doesn't want to do the task handed down to him and explain that this task came from the CO

aT LEASED A 100 PUSH UP S M OR SQUART JUMPS