I usually leave my bike leaning against the wall in the hallway resulting some marks on the wall from the handlebar ends. Also, Sometimes, the hard metal ends of the grips being very slippery againsf a hard surface like the wall, make the bike unstable and very easy to fall off with the slightest push. That creates even more mess with dirt marks from the tires and saddle.
But recently my girlfriend had a brilliant idea. Why not put at the end of the grips two sticky furniture pads. And I did and it really makes a huge difference!