Is it really worth the cost and bother to install a garbage disposal? There are several benefits of using a disposal over tossing your food waste into the trash. When you put food waste into a garbage bag you are inviting rodents and bacteria to enter your home. Having a disposal will also cut down the number of garbage bags you will have to carry out each week. When the garbage is tossed into the dump you are creating emissions into the air. Garbage disposals are very cheap to operate.