#1 There is no quality assurance when it comes to information found on the Internet: Anyone can post anything.
#2 In most cases, information found on the web has not been checked for accuracy.
#3 Not all web sites are created equal. They differ in quality, purpose, and bias.
#4 Some web sites have sponsors who pay for specific content to promote their products or ideas. The information is not impartial but biased.
#5 Some web sites voice opinions rather than make informed arguments.
#6 Some web sites are meant to be entertaining rather than informative.
#7 Some web sites seek to scandalize and breed controversy rather than provide reliable information.