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

Do "positive reinforcement" training, such as doing the work with him.

DA4856 disrespect to an NCO

If you want to continue serving then you will follow all lawful orders given to you by your leadership. If you do not want to wear a uniform anymore then that fine too. I will happily begin the separation papers, and until it's been pushed up and completed you will follow all lawful orders given to you by your leadership.

I would politely correct him.........pause
No I would tear him a new one...along with my fellow Sgt's.

What is a senior E5???

half right face front leaning rest position move!

He would become the strongest E-2 after he gets done boring me watch him do push ups. Cant do such things anymore. Might get in to trouble. LOL

Make him an E1.
Seriously though, I would let the 1SGT deal with it, away from others. I'm sure he'd straighten him out. Wait... are we talking combat arms unit or everything else?

A little extra military instruction could square this individual away because the truth is if he is willing to do that while in ranks then he would be willing to do that in public. Needless to say, being an in Bassett or for the military wow in the eye of the public the military needs to make sure this doesn't take place That being said either he squared some stuff away on must be administratively discharged

Chance of that happening to me were slim to none. I seriously doubt it would happen today in the Marine Corps. or if it did, it would only be once for the shitbird