At the risk of angering our resident Karen by continuing this: no, it doesn't leave a footprint, it's just a simple "volume changer" that works at the analog level (the computer can't even detect it) by amplifying the voltage. Nothing more, nothing less. It doesn't change the signal by putting it outside the range of expected voltages, nor the speed of change, it does exactly what your right foot does.
Next up you guys will be trying to convince us that gluing a 1 inch wooden strip to the pedal voids your warranty because, hey, modification.