Yep.. the same companies who would fire you for removing their means of tracking you...
Some people in companies become obsessed with the technology and “keeping tabs” on employees. If one is a good manager one should be measuring the end results and not involved in the minutia of tracking an employee on their day off. However, some employers begin to resemble a jealous husband; obsessed with knowing every detail, attempting to “control’ the person, and losing track of the big picture.