If you saw one of your Joes doing this, how would you react?

Someone needs to look at the uniform regulations. I assumed that the ACUs were to be a duty uniform and only can be worn during duty. With the Navy NWUs I was under the impression (with the changes) that they can be work during a work lunch, during duty and to and from duty area (driving to/from work).

Alright need to interject something here. I know that in the National Guard, things are a little different. I know that I once while in the Ky National guard, I helped the recruiter set up at a high school basketball game. Our duty uniform, at the time, was BDU's. So therefore if the kid was helping at a recruiting function at his high school and was at the ball game helping out. Was voted as one of the court for say Homecoming, and was in his ACU's ON DUTY for the recruiter. Then they took the pictures then and there. Then he is with in REG's.

Just because you see the photo you don't know what is going on.

Now if you see someone out after duty hours at the club or at the local watering hole, then yes, that is and issue.

First this might be homecoming which happens at the beginning of the school year. The girls have homecoming banners on.

No idea of when this happened? New recruits don't get ACUs anymore. We also give unit patches (US Army logo) to AIT students to wear. No one goes without one except at Basic Training.

My guess as to what is happening here:

He has no unit patch so he might have gone to basic training during the summer and is wearing ACUs (inappropriately, of course) as a senior on his way to AIT.

Or he could be doing a function as part of a detail and didn't put his patch on.

Or....he is a civilian douche just wearing a set of ACUs.

What would I do? Well if this was back when I was a SPC or SGT I would likley have done like many here have done assumed and made and ass of myself.
In later years I would have asked a few questions to understand if this was a mistake or intentional and then educated or educated and rebuked situation dependent. And then get onto more important things. Young soldiers make mistakes, if no one died or was hurt, let um learn from it so they can grow up to be leaders.

BTW, more than a few seniors in highschool are 18. I was my entire last year,,,my birthday being 3 days after the school year, so i came into my senior year 18, an "adult" wreaking havoc with the system being abley to "sign" for myself... "Erik was absent yesterday because Erik was at the races, racing, which was deemed more important to his education than PE, Auto Shop, History class for the day.... Signed Erik"
But that as they say is another story.

I wouldn't react, but then again I am not in the Army anymore and Facebook was in its infancy at the time I got out so I never had to deal with these things. From my civilian perspective, it is pretty funny that he is pimping with cheerleaders lol.

ACUs are a pretty lame Prom outfit for sure, but the girl he is standing with is in her cheerleader outfit so I don't think "fancy Prom" was what they were going for. I mean FFS she is wearing Tennis shoes.

I've seen literally hundreds of "return home" videos where Soldiers, Sailors, Airmen, and Marines return from deployment to surprise someone at a formal/semi-formal event in a uniform that would not normally be appropriate. I haven't heard of any repercussions of those uniform violations.

Old school USMC - Utilities are inappropriate attire off base unless traveling under orders. (i.e. if your car breaks down or you run out of gas, you've got some explaining to do). The current popular trend of mommy or daddy surprising their child by returning from deployment and surprising the kids at school or home has created the illusion that utilities are OK of base. May be they are OK off base, but they shouldn't be.

That would require some discussion with what is and what is not proper wear off the installation and where to and not wear any uniform combination. There was a time fatigues, BDUs etc were not even allowed off as Post or Base except to travel to and from work and no along the way stops allowed. This troop did not use very good judgement !

I was able to go see my HS class graduate. (I had gotten a GED and enlisted which at the time was allowed I also had to have parental consent because I was 17). I didn't even dream of wearing anything else but my Class A uniform. Is discipline lacking now? The only fear I ever had was of disgracing myself by not following my regulations.