Well, sometimes an actor puts their foot in their mouth so often and so deeply, it can be difficult to push their politics or personalities outside of your mind long enough to enjoy the film. And sometimes, in the case of Woody Allen or Altman, an actor may commit a wrong (in a person's estimation) so egregious and avoid punishment that one may not permit themsevles to support their filmmaking habit anymore. Does that make the audience simpletons? I think not. We're all human, and while seperating art from character may be a lovely ideal, it can be difficult. As for Penn in particular, his commments on Iraq were so ludicrous that I have trouble not chuckling anytime I see him onscreen. But congratulations to him on the reviews.