There are, however, some further steps to consider. If the information is placed on a .gov web site, it comes from the government. Corporate information is very important to companies. Much internet information include dates and author information. Use your experience to judge if the information is coming from a professor of legal studies or just some bystander expressing an opinion.
Web pages are usually password protected and passwords can be broken.
Internet Security is a huge industry. Expect better protection in the near future. Internet Libel and breach of copyright can be legally punished. Incorrect posts or libelous posts can be removed after publication. This is a very simple method of including basic details about the placement and development of text and graphics on a written page.