May be you have ideas how to enable renting of digital goods without resorting to unethical preemptive policing? Until anybody comes up with such, renting of digital data will remain a bad idea.
To put this in perspective. When you rent physical goods, do you find it acceptable to be tracked while you use them with some hidden surveillance mechanisms?
But I honestly consider renting of digital data stupid anyway, since it's pointless. There is a valid reason to have renting for physical goods - it allows reusing of the same object and removes the need to make another one which is costly. So it lowers the price for the user of the object as well. Digital goods have none of these issues at all. They cost nothing to duplicate. So renting them simply has no point whatsoever, and is used to reduce usability and out of paranoid fear of piracy, not because it's making anything cheaper and reusable.