This is outrageous. I install software on my computer to block ads, a clear statement of user preference. The Economist colludes with PageFair to ignore my choice, to run software on my computer that I explicitly don’t want. That software they run turns out to be installing malware.
The folks who write things like PageFair need to be sued into oblivion. Not just the company; stop the people who built this abusive technology from ever creating software again.