Are pill bugs bugs harmful to your composting efforts or do they help like earthworms?

Elsewhere in the garden and yard, pill bugs can be annoying. They particularly favor moist and over-watered spots. But in the compost bin or pile, pill and sow bugs help. They can handle cellulose and lignin. Along with centipedes and ground beetles, their presence puts the stamp of approval on finished compost. At the end of the composting process, they will be right in the midst of all that crumbly, coffee-brown colored compost that has the smell of fresh earth.