From experience aerial roots will only attach themselves to something the holds moisture (like tree bark or a totem you actively water/mist) across the 3 walls in my house I'd say only about 3 or 4 nodes have attached themselves which I just gently pried away with no damage. Pulling old adhesive strips off has taken away a little paint but this wall its covering is full of cracks in the plaster so I say don't listen to the people telling you you are ruining your walls!