Yes and no.

This is great. Perhaps negative, but great.

This is a ridiculous and terrible idea. The definition of "native" is loose, I agree, but unless you're going to create different types for each regional watershed, cut it out. You're introducing non-indigenous seed. And, um, not to make assumptions about other people's hygiene, but I usually try to find places that are already vegetated when I need to relieve myself. Who shits in a clearcut?