vera, could you, please, post the link to your original thread? Or at least could you summarize what is the "bad care"? It's kind of hard to judge or give an advice without knowing the situation.
However the idea of attaching letters to the stalls sounds pretty odd to me. I'd think it's something you have to get an OK from BO first, otherwise it may be considered as violation and harassment.
"Life isn't about waiting for the storm to pass: it's about learning to dance in the rain..."
"When we are no longer able to change a situation - we are challenged to change ourselves."
"How people treat you is their karma; how you react is yours."