It's not like she stuck her middle finger in your face and told you to go f*ck yourself.
An actor's duty to you as an audience member ends when she leaves the stage. Whether or not she wants to sign autographs is her business. However--as this board so frequently reminds us--we live in an entitled age, and an actor who chooses not to do the stage door thing is often derided as being unappreciative or a bitch.
"You travel alone because other people are only there to remind you how much that hook hurts that we all bit down on. Wait for that one day we can bite free and get back out there in space where we belong, sail back over water, over skies, into space, the hook finally out of our mouths and we wander back out there in space spawning to other planets never to return hurrah to earth and we'll look back and can't even see these lives here anymore. Only the taste of blood to remind us we ever existed. The earth is small. We're gone. We're dead. We're safe."
-John Guare, Landscape of the Body