I have mixed feelings about this. We also live in an area where cars with unlocked doors get “invaded”, as we come out the next day to find the contents of our glove compartment emptied, but nothing (other than the change) taken.
But it’s this part that bothered me:
I’m aware that I’m an artist with the creative luxury to design an experience. And this person is unknowingly involved in that experience.
It seems unethical to enlist any person in your art experiment without their knowledge or consent. But to surreptitiously enlist a (hungry and homeless) person in this endeavor for your amusement moves into the area of cruelty.