Added Apr 19 2017
I live in a 6 unit building with a nice little yard surrounded by a privacy fence. I have a patio set that I keep in the yard. Last year all the other neighbors in the building used my furniture as if it were theirs, no one asked permission. Everyone knew it was mine. I did not mind at first because I didn't use it everyday and I wanted to be neighborly. Some smoked cigarettes and used the table top as an ashtray and butted out their cigarettes on it, left the butts on the table or tossed it on the ground under the table, some left burn holes on the chairs, allowed their pets to sit on the chairs and snuggle up to soak up some rays, kicked their feet up on the table while sitting in the chairs, some have moved the set to position it elsewhere in the yard to their liking, and someone damaged the umbrella which I had to replace- twice last summer.
This time I do not want anyone to use it. I did notify my landlord who is a Chicago police officer. His response to me was that he didn't want to deal with petty drama.
Any advice on how to deal with this?