Wow, were you a 91C or psych specialist? I was a 91B20 before I left. I was hardcore also, serious but I could have fun with the troopers too.
My worst case of being hardcore was at PLDC at Ft. Knox (MDW does not have a PLDC, they send you TDY to another post).
Anyways, you know how they switch people around playing squad leader, platoon leader, etc...? I was platoon leader (or plt. Sgt. whichever term you prefer). The guys and gals were taking a break in the field and instead of preparing for the mission coming up, some jokers were talking about "being in the hood" and drinking fortys and crap. Needless to say I made everyone get in formation (the instructors watched the whole show), stand at attention for a long time while I walked in front of them and chewed them a new one royally and said some of them did not belong in the army but out on the street! I said a lot more but cannot post on the forums. Needless to say when we got back to the bivouac (hope I spelled that right) area even some of my most loyal friends that I had made and the slackers were pissed. The instructors pulled me aside later and told me that I was right on the money but it was just school, and everyone including myself was learning.
Next morning I had to assign serving and cleaning duties for chow in the field kitchen, I put some trainee NCOs as well as my trouble makers on that detail, man were they glaring at me, but I put myself on the detail too so I was like WTF?
Graduated commandants list, my ex C.G. from 3rd AD was present commander of Knox at the time, and was going to promote me to Sgt in front of the whole school as he knew me when I got my EFMB and I was the brigade surgeon's asst. and driver after that, so I became friends with Col. Nash's driver as well as many other leaders of first bde, 3rd AD. My E.R. platoon sgt. at Ft. Belvoir was ecstatic that I did so well (you know hospital types, some hard chargers but a lot of slackers) that he recomm me for another AAM. My hospital commander was NOT pleased that I was going to get promoted by a General instead of him, so he downgraded me to a Cert of Achievement.
I'll never forget after graduation, I will not mention race, but some of the troublemakers (females included) had the nerve to tell others behind my back that some people (like me) did not deserve to graduate commandant's list. Well, I wish I could have lost my military bearing and done a wall to wall on each of them, I had many guys to back me up if I wanted. It was the slackers own fault, while they BSed around, I studied everything and practiced drills with some of the hard chargers in my spare time, as I wanted to do well, but I also knew that it was only for 30 days, then back to good ole MEDDAC!
Regarding non UCMJ punishment, I think what you did was great! I knew a Dentac NCO at Belvoir that was a hard charger, and he had a problem trooper. Guess what he did? You will love this one. All weekend long, and I mean all weekend he restricted his problem tooper to the barracks and hospital chow hall. Every hour on the hour for eight hours a day, he made him put on his dress greens (the NCO lived in the barracks too) and he inspected him with the magic millimeter/inches ruler for inspection. After inspection? He made him take off every ribbon from the uniform (he did not allow him to use the ribbon bars that make everything so much easier) and iron the uniform (top part) so the old holes would not show and he had to start from scratch, hehehehehehe. For every gig that he got? Another hourly inspection tacked on to the 8. Needless to say, that trooper never gave that Sgt or staff any more problems.