Government agencies are buying up commercial data sets from cell phone companies, retailers, online services – all legally – which can be used to track your movements, what you read online, what you buy – everything. U.S. Spy Agencies Know Your Secrets. They Bought Them. – WSJ

A week ago I fell and bruised a muscle. I went looking online to read up on it and learn how long it takes to heal. Not long after, I am receiving online ads for products associated with dealing with this problem. Separately, I looked up a camera lens at a online camera retailer – every day since then I am now seeing ads for lenses from this specific lens brand, everywhere I go online.

They really are tracking everything we do.

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