Inchworms are both good and bad.
The Inchworms are good for the earth as they help to eat and dispose of foods and other matter in the earth and turns them back into the soil.
However Inchworms can also be bad because Inchworms can eat leaves and other plants that you don't want them destroying.
If you have trees and other plants the Inchworms could damage those trees and plants by eating the leaves and other parts of the plants.
So in that case you would want to get rid of the Inchworms so that they do no harm to your plants, trees or garden.
To get rid of Inchworms you can use insect killer such as Sevin insect killer granules.