mark nine...very black and white of you.
When this happened to me and my captain was perhaps over the limit it was my DUTY to protect the plane, the crew, the pax and me. Nothing to do with "grassing up". Its why an FO is there.
My cabin crew apoproached me in the end and told me that if I didnt sort it (I wasnt worried about him he seemed fine to me), then THEY would. So I gave him the option of suddenly getting ill, which he did and he left the plane. But if he hadn't then yes, I'd have called a manager in. I'm no prude so don't get me wrong, but if a flight deck member wishes to fly with me hee'd better be asclean as a whistle or it's back to the office. I'm not going to die for the sake of someone elses booze trip.
Ineveitably these things are not always clear cut. A bit like minima really!
david