Here's the scenario. This happened to me. What would you do?

You are eating lunch in uniform in a relatively full gate area minding your own business but with empty seats around you, when a woman says in a loud voice that is heard by many pax in the surrounding area that she is going to "sit next to this pilot and see if he is drunk!" She then proceeds to sit right next to you.

You are about to:

1. Jumpseat in the cockpit

or

2. Fly the trip that is departing from this gate

What do you for each case if you feel the reaction should be different.

I said "Ma'am, it is completely inappropriate to make jokes like that" and I walked away. (I was j/s btw)

What do you do?

Anyone got their own similar stories and resolutions?