VPNs And Privacy: Using Virtual Private Networks May Put Your Data At Risk : All Tech Considered : NPR

With Internet providers able to track and sell your browsing data, people who want to keep their activity hidden are turning to virtual private networks. But VPNs can themselves be insecure.

http://www.npr.org/sections/alltechconsidered/2017/08/17/543716811/turning-to-vpns-for-online-privacy-you-might-be-putting-your-data-at-risk