Taking care of an exhaust system is extremely important. Oftentimes, exhaust systems can rust and/or crack; this can be extremely dangerous for the driver and the vehicle itself. The chances of this occurring increase if you live in areas that have salt and snow on the road because both of these are facilitators of corrosion. If you do live in an area like this, it's always a good idea to take a hose and rinse the underside of your vehicle every few months, but don't overdo this either because excess water could also lead to rust.
Remember, the exhaust system is responsible for carrying deadly gases away from a vehicle and keeping a vehicle working efficiently, so it's very important that drivers pay attention and stay up on repairs.