I had a house with cracks that led to the exterior, so I had ants. But they were very unobtrusive and would only show up, in neat and orderly single file, to clean up crumbs from my coffee table, kitchen counter, etc, carry them off and disappear. I also killed a roach on my floor once and didn't have the stomach to look at it, let alone clean it up; by morning it was gone. The ants had carried it away. My ants were my happy helpers, basically like a Roomba. I forbade my visitors from killing my ants.
I had a house with cracks that led to the exterior, so I had ants. But they were very unobtrusive and would only show up, in neat and orderly single file, to clean up crumbs from my coffee table, kitchen counter, etc, carry them off and disappear. I also killed a roach on my floor once and didn't have the stomach to look at it, let alone clean it up; by morning it was gone. The ants had carried it away. My ants were my happy helpers, basically like a Roomba. I forbade my visitors from killing my ants.