Why is it important with information knowledge?

Thanks to Anne and Even, to librarians, I have seen a good example on how important it is to check websites.

The World Trade Organization main enemy, Attac host this site: www.gatt.org
The World Trade Organization's real website is this: www.wto.org

Can you see the difference easily? If not, I recommend that you take a look at this 85 pages tutorial from University Library Berkeley. http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/FindInfo.html

About this tutorial:"This tutorial has been the most heavily used and linked to tutorial on web searching that exists anywhere in the world." Joe Barker, Berkeley

"Pandia has taught you the basics of Internet searching. Where do you go now? We suggest you take a look at the UC Berkeley Library's tutorial on finding information on the Internet. It is huge, up to date and gives you detailed searching instructions for all the major search services. Researchers and librarians should definitely take a look."
http://www.pandia.com/resources/tutorials.html