I knew this was bound to happen. United Airlines stock dived the other day, because people don't know how to read web pages properly.
When I right click on a page and look up the page's info, sometimes it gives me more information, including the original date of publication. Often, it does not. So many websites are database driven, and things like template or sidebar changes make a page count as "updated" today, even though the article is from 2002.
Shame on any newspaper, other periodical, or article-driven website that does not make it clear and easy to determine on what day (and in what year) an article was originally published.