Google maintains several blacklists and does censor valuable information. Currently Google maintains around nine blacklists, without public knowledge or anyone's authority. Censoring information without the users knowledge is a way of blocking information, and at times information which could be valuable. Since Google is one of the biggest search engines, such censorship would imply that Google ultimately decides, what information users access and have access to over the internet.
Google, Inc., isn't just the world's biggest purveyor of information; it is also the world's biggest censor. The company maintains at least nine different blacklists that impact our lives, generally without input or authority from any outside advisory group, industry association or government agency. Google is not the only company suppressing content on the internet.
I agree that Google censors valuable information, however, I believe they do it for the protection and well being of their customers. It is necessary for a company as large as Google to censor certain things to maintain confidence with its customers and consumers. This is necessary to keep trust and reputation.
The Google blacklist software scans for offending or harmful information and may blacklist a legitimate website because the content could not make it past this filter. While some of that information may be legitimate, it is important to Google as a business to attempt to protect their users. Despite being an integral part of our lives, Google is still a business looking to provide the best content to the end user.