That reminds me of another old lady incident.
Flying LCY to AMS on KLM. During boarding I notice an old lady being helped across the tarmac to the plane. Assuming that at her age she's just a little unsteady on her feet I think of nothing of it. I take my seat at the back of the Fokker 50 and she sits near the front.
I notice the cabin crew looking at her quite closely. Eventually they take a glass of water over her. They disappear for a few moments, then come back and say to her that the captain wants a word with her and can she go to the front. She says "No" firmly and turns to look out the window. The CC tell her that whilst on board the plane she must do what the captain asks. Again she says "No" and looks away. Cabin crew disappear to talk to the captain.
After some time they reappear and stand at the row behind her seat - I can't see what's going on but there's some commotion. After a short while I look out the window to see two of London's finest constables escorting the tottering old lady across the tarmac towards the terminal.
Doors are finally closed and the captain does a PA: "Firstly I'd like to apologise for our late departure and secondly for the spectacle which you've just had to endure - I'm afraid one of our passengers was clearly 'unfit to travel'".
Clearly the "little old lady" had had a few gins too many in the lounge..
Just goes to show, drunken difficult pax come in many shapes and sizes.