It is difficult for me to decide the motives behind Sarah Palin's wardrobe. Palin has seemed ill-equipped to deal with the media spotlight since her first arrival on the national scene. The media has not been kind to her, and she has returned the favor. It would seem to me that Palin has struggled to execute a clear message at all times, including her current stance on the Copenhagen conference. This would lead me to believe that she would not be savvy enough to convey meaning through her defacement of a visor. She had her ARMY shirt on, isn't that enough? No, with so much coverage and such a strong demand for new information, Sarah seems to be a bit of a guinea pig in this world of new media.
I think it is probably equally likely that she covered it out of an attempt to lower her profile as it is that she and her family would have had a real knee-slapper about it, but neither case does much to improve her poor showing in the global news market. I hope, for her kids sakes, that she hangs up her blacked out visor for a while and finds something else to do, but too many Americans want an ignoramus to admire to keep her on the sidelines for long.