Porcupines can be dangerous to people if they are threatened or provoked. They have sharp quills that can cause a painful and potentially serious injury, especially if the person is not wearing protective clothing or gloves.  Generally, porcupines only attack when they feel threatened, so it is crucial to stay away from them if you see one in the wild.  Additionally, keeping pets away from porcupines is essential, as their quills can become stuck in an animal's skin and cause injury or infection.