I had a crew member reported to me in-flight for surreptitiously drinking in the galley. There had been suspicions before that the innocent fruit juice on the galley top was more than it appeared. Her fellow crew members were all pretty pissed off that her behaviour had become so blatant.
That's the problem with being a Captain.... People come to you to tell you stuff you don't really want to hear. Sadly I could not look the other way and the outcome was pretty much as above. Several of the comments above demonstrate precious little awareness of the working environment.