Illustration by Tag Hartman-Simkins / Futurism. Source: Getty Images You know those memes about how there’s no such thing as a free VPN? Here’s the ultimate cautionary tale. A recent investigation by Tel Aviv-based security firm Koi uncovered a massive data harvesting operation tied to a voluntary extension on Google’s Chrome browser. Called Urban VPN Proxy, the free extension has some six million users at the time of writing, and even a “featured” badge o