Mine are very peaceful I have never seen them bother anyone else theres a dojo loach in there with two bumblebee cats and a common pleco a clown pleco and an albino BN along with my 5 juli cories.
The "stump" is actually 4 pieces of driftwood stacked together. Most large pieces like that are too expensive for my taste so the smaller pieces work better for me.
Mine are never out and about. Very Rarely I can find them wedged between two leaves or at the base of a plant.
Heres an updated shot of the tank. The plants that are hanging in are fake but I needed more kind of top cover for my white clouds and gold gourami's and extra places for my otto's to sit.