#5 Google+

Google+, Google’s social networking site, required users to identify themselves using their real names, and accounts may be suspended when this requirement is not met. It raked up the controversy since pseudonymous speech has played a critical role throughout history and feel that the Google+ policy deprives some people of an important privacy protection tool.

Google ultimately lent its hear to the controversy and on October 19, 2011, at the Web 2.0 Summit, Google executive Vic Gundotra revealed that Google+ would begin supporting pseudonyms and other types of identity within a few months.

And in 2012, Google said that it will integrate Google+ photos and posts into its search results pages through an initiative called Search plus Your World. It immediately attracted complaint from Twitter and raised the possibility of further government scrutiny.

Twitter said in a statement that it expects Google's changes will make it harder for people to find tweets, to the detriment of Twitter, news organizations, and users of both services.

Certainly there's an element of truth in this: Given a page with a limited number of search results, Google's decision to add results from Google+ (if not overridden by users) will leave less room for Web content that otherwise would have been presented by Google's search algorithm.

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