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When Google Buzz launched last year in 2010, it was the first micro-blogging social network-like service for which users had to opt-out of -- as users with a Gmail or Google account were automatically opted in without their prior permission.
It also added pre-existing contacts from a user's Gmail service into Buzz, which drew vast criticism from privacy critics and the media alike.
Not only this, a major privacy flaw allowed users to see who one was emailing and chatting too. While this was quickly changed and 'reset' by Google, it had already left a bitter taste for many of Google's users.
Censorship has been a huge topic for Google to try and deal with. It complies heavily with DMCA (Digital Millennium Copyright Act) requests on a regular basis and filters out searches. It also responds and complies to requests for the removal of other potentially damaging information.
Its presence in China alone has stirred many comments regarding the government's poor human rights record and lacking in freedom of speech legislation.
YouTube, also featured later in this slideshow, removes vast numbers of video each day. On the other hand, many of these include content copyrighted by others, and YouTube has had in place for some time the function to disallow even the publishing of videos which may contain music or content held in its copyright database.
Google came under heavy fire from critics and supporters alike, when it was discovered that a rogue piece of code in Google Maps' Street View cars allowed the collection of unencrypted wireless data, from houses and businesses as it drove by.
After Google admitted its mistake, through a data audit demanded by Germany's data protection authority, the company said it would not delete the data even though the British data protection agency said that it could be.
Google faces criminal investigations in Germany, and was only given a 'slap on the wrist' by British regulators. But Germany's data protection laws are far stricter, even though all EU countries read from the same European data protection directive.