I really, really hope you are joking.
Nope..not joking. You see, there are not any earthworms in the area where I live. None at all. I thought that was weird. Other places I've lived, you dig in the ground and you will always find worms.
So I thought if I added worms, I'd be enhancing the ecology of the area. Reading this article and a couple of the other ones referenced, I realized that the earthworm isn't a native, so why would I want to introduce a new species?
BTW, the coons, possums, skunks etc. are doing just fine on the grubs, mice and rats :)