In fact, the Magnusson-Moss act makes it illegal to void a warranty even for 3rd party, aftermarket modifications to a product, unless it can be shown that the

In fact, the Magnusson-Moss act makes it illegal to void a warranty even for 3rd party, aftermarket modifications to a product, unless it can be shown that the aftermarket modification is the cause of or contributed to the warranty claim. So even if you had some random black box that you plugged into your cameras USB port, and it would send all sorts of wild commands to the camera, that would not void your warranty unless the black box was actually responsible for the damage to the camera.