Meet 'Zombie Cookie' -- an online advertising tracking code you can't kill
Angry woman in front of a laptop (Shutterstock)
An online advertising clearinghouse relied on by Google, Yahoo and Facebook is using controversial cookies that come back from the dead to track the web surfing of Verizon customers. The company, called Turn, is taking advantage of a hidden undeletable number that Verizon uses to monitor customers' habits on their smartphones and tablets. Turn uses the…