Here's Another Reason Using a Free Android VPN Is a Terrible Idea
by David Murphy from Lifehacker on (#5200G)

There's no such thing as a great free VPN. Or, rather, there's only one free VPN you should trust, and that's the one you've set up yourself. Otherwise, any app that promises you a free and secure VPN service is either tracking what you're doing, sending off information about your activity to advertisers or investing"