I have not read all the replies, but I think a bumper sticker with a web address would be the answer. The bumper sticker could have a little thought-provoking saying on it, or various sayings, but if they all pointed to one web site then after while people would get curious and want to check it out.
The website could immediately and clearly present a more accurate picture of the war in Iraq so that people are interested enough to spend a little time on the site and hopefully become educated in the process, at least a little.
Good idea!