Can landlords get away with this?

Every year our landlords do a "walk-through" of the apartments. That's fine I have no problem with that part of it. I know that they have to post an intent to enter 48 hours before coming into our apartment. The part that is annoying is the fact that our landlord put the "intent to enter notice" at the end of the stairway banister for our group of 4 apartments instead of putting the notice on each apartment door. My husband saw this notice and thought a tenant put it there and he took it off (of course we put it back when we noticed what it was) but what if someone else took it off and didn't replace it and we never saw the notice and they came into our apartment while we were gone...our dogs would have been running in the apartment and could easily have gotten out. So for my long question can a landlord get away with just putting an intent to enter notice on the stairwell banister?