Driving with the parking brake engaged is super dangerous. It'll wear out your brake system like crazy—maybe even make it fail completely. And don't forget about your tires—unnecessary wear increases the risk of a blowout. The parking brake's designed to keep the car from rolling when it's parked, not to help slow you down while driving. Keeping it on for too long while moving makes the brake pads and rotors get blazing hot, and in the worst case, that could even start a fire. If your parking brake light comes on but you're still moving, pull over safely right away and check it out—don't keep going. Get into good habits: always make sure the parking brake is fully released before you take off. Regularly check your brake system too—things like brake fluid levels and brake pad thickness—to keep everything safe. For cars with electronic parking brakes, sure, some models release automatically when you drive, but don't count on that. Better to check manually. If your parking brake feels loose or isn't holding as well as it should, head to a professional shop ASAP to get it adjusted or parts replaced. Don't let it mess with your daily driving.