We tried to make a pet out of one when we were kids. Cute and would follow us around the yard. But it would want to cuddle. Use your imagination on how that worked out. It would walk across the floor and leave a trail of quills. Made the rug impassable when walked on barefoot. We finally repatriated it to nature.
Porcupines are the enemy in eastern Montana. They will girdle the few trees that grow along creek bottoms and kill them. Mostly open season on quill pigs.