> Rather than anti-tracking software, I believe even by your definition (meant to track ads' tracking behaviour) it would be considered tracker-tracking software.

Fair enough; I didn't mean to claim that the headline was objectively wrong, just that it risked being misleading. I am fine with software tracking lots of stuff online, as long as it doesn't expose my private data to someone else. (Whether Ghostery meets my personal bar I can't say; I found its UI on Firefox unpleasant, and switched to Privacy Badger.)