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[Maxpphire]

Honestly do you even know what google does by tracking you? Its nothing malicious, its that if you use their search engine they can tailor searches to be things you like. They also use that same technology to custom fit ads to be things that you'd be interested in. Its really not that much of an invasion of privacy as you're thinking, they just keep track of websites you go to, to be able to bring you to other similar websites.

Facebook tracks your location to bring you pages and friends that are around your area.

Twitter keeps track of your friends mainly to suggest new friends.

None of them are out to collect your credit card number, relax.

These days your location, who you are friends with, and what you like are not private things. To be honest they were never exactly private things in the first place, I mean not everyone knows your location at any given time, but no one ever will. You don't have to be so paranoid, particularly on Linux.