[Tzfat]

I would have invited her to the cockpit and let her perosnally know I am fine.

The rules say that if a question of sobriety is expressed, both pilots have to be tested. Then the accuser will face the consequences of a false accusation. I would never let a false accuser on my aircraft. I am responsible for everyone on the flight and I would have doubts about their mental stability, or their own sobriety. I have a responsibility to not get airborne with questionable characters on board. Captains deny boarding to passengers every day. You just don't hear about it.

If you want to be delayed, or be denied boarding, just act on your "expert" opinion next time you fly.

[CodeToad]

“The rules say that if a question of sobriety is expressed, both pilots have to be tested.”

Which rule? If you are an FAA examiner that would be an easy post to make.