Because I'm getting sick of going for walks with MIL, her little dog doing poops and her saying, "Oh, you can't see that, it's in the roots of a tree,", me saying, "But a child could fall in that. It's disgusting." I once even said, "What kind of a pig leaves dog shit lying around?" but it's the same every time.
She just doesn't get it. I get really annoyed because each of my DCs have fallen with their hands in poop and it's the most disgusting thing ever.