I happen to know that the local legal scandal rag here has a full time employee whose job is to gather unflattering photos of possible subjects of news articles. They do a pretty good job of it, too.
That seems to me to be part of the job description for AP photographers. Given that I regularly check the photos posted on Yahoo! News of Pope Benedict XVI for the weekly audience threads, it seems that the most unflattering photos tend to be attributed to the AP.