Drats. The pine branches are not working. I checked again and there's poo again. Same place. They seem to just push the branches aside to get to the dirt. So the only thing that seems to deter them is the Scarecrow sprinkler.
But on a more positive note, I've spoken with the lady who likes feeding them and she is thinking of ways to help these cats so the neighbors don't catch them and send them to the humane society. Apparently, I'm not the only one who doesn't want the cats around and someone else has confronted her. She's a nice person, and I do feel sorry for those cats, but leaving them there and feeding them won't solve the problem.
She has called an organization who lent her 5 cat traps. She'll be catching them and taking them to the organization and having them spayed/neutered and microchipped. Then she will take them to a place FAR from here, and away from other neighborhoods. Problem solved. I hope. It's an expensive venture, but appears to be a good solution and will keep the neighbors from having them euthanized.