Well it is the recommended minimum in many states, a quick search of DNR rules showed that WV wasn't the only place that allwed it and it doesn't have to be a head shot either but yes, I agree that 100 years if definatly a limit.
Compared to somethng like a .410 with slugs the .22 hornet will more easily take a deer. I know a lot of kids start out with the .410 slug, I did too and it didn;t have much stopping power at all.