Many times, a site's address will provide some clues. In this case, an individual named Smith has put Web pages in his or her personal directory, and made their contents available to the world.
Authors put information online for a reason.
These are the two most telling questions. If you've never heard of the author or if the information wasn't well written, chances are you should do more research into his or her background before accepting the information as factual. Check the library to see if this person has published anything in the real world. Follwing the links online authors place inside their online information is one of the best ways to discover more about the author. These links may also reveal any biases of an author.