This was what one of my neighbors did to my back yard when I wasn't looking.
He had to run out during the day real quick and had left his garage open. I was out front and he asked my to watch out since he left it open. I went in his garage and found a roll of caution tape and taped the entire entrance to his garage so no one could get in. As a pay back when I wasn't looking he cautioned my back yard. I didn't even notice it until the evening.