In support of the rage of man

[Athene]

Simply blocking a doorway with no physical act or threat is not a criminal offense. 

I believe that blocking any citizen's ability to move freely constitutes arrest, and that preventing someone from leaving a building by blocking a door constitutes false imprisonment.

What you "believe" doesn't matter, benny. There has to be a physical act or threat for it be imprisonment.
Her simply placing herself in front of the exit and saying "I'm not done talking" does not amount to that.

If she brandished a weapon, OR perhaps even simply said "I will kill you if you attempt to leave", OR pushed, shoved or otherwise assaulted as you attempted to leave, then yes, THEN yes, she would have committed a crime.

Okay, we've been on opposite sides frequently in almost every kind of discussion.  But let me ask you what you would do if a man said, "I don't want to talk about this right now, because I'm beginning to feel upset.  I need to get out of here right now, and we can talk about it later."  Would you attempt to prevent him from leaving?

I might stand in front in a door for a few moments, depending on how badly I wanted to finish what I had to say. I wouldn't wrestle with a motherfucker in my doorway like some idiot and attempt to physically restrain him from leaving though.