What would you do if you saw this at a liquor store?

This is when I introduce myself and shake her hand and get her name and unit. I then ask what her course of action is to get home since she is drinking in public and in uniform. I offer to call someone above her in her chain of command to get her a ride home. The picture I would take of her drinking in uniform would ensure that she does not get into her car to drive away quickly. I get her license plate number (post ID sticker back in the day). If she appeared buzzed in my opinion and she tried to illude me I have that covered too. The boot blousing discussion I throw in free of charge. Officers make policy. NCO's enforce policy. I would enforce that young major up one side and down the next.

I've stopped at liquor stores many times while in uniform on the way home. I live 20-30 minutes from most stores, so if I'm picking up a drink, it's on the way home. But I try to be in/out quickly - and definitely not stopping for wine tasting. I've even sat outside the store for a few minutes to wait for people to leave before I go in, because I hate the look of somebody in uniform buying alcohol. With that said, it's that or driving 30 minutes home, then 30 minutes back to the store, and then 30 minutes back home again. I realize it doesn't look good, but I'm not doing 2 hours of driving to get a beer.

Tough question, but away from anyone and very tactfully, I think there is an opportunity to discuss with the Major the image the Major is projecting. That would be a tough on-the-spot correction, but with finesse and tact it's possible.