When we shoot portrait, or shoot anything, we as the photographers can do whatever that pleases us. However, we must pay attention to the end results, especially those that are unexpected.
Shooting portrait close up, body parts can easily be distorted, such as hands legs or knees being out of proportion big, only because they are a few cm closer to the camera. Using a wide angle lens will amplify that problem.
Wide angle lens also distorted anything towards the edges, and there lies the problem with hobbit size feet. Yes, a wide angle lens can elongate limbs, and makes legs longer, so will it makes the feet that much longer.