I once offerd a dog walking neighbor some dog treats my Yorkie did not like. The entire thing blew up catastrophically. The woman was a nut job and I later learned was a trouble maker even at her sons school. We had words, next her husband came to my house and challenged me, he to was a bully and would throw aluminum drink cans on my lawn. One day he dumped about 20 cans, I guess he had been saving them up, and this would be his grand moment. I knew who it was, so I gathered all the cans, punctured every one, laced them all together with string (about 60′ long) then late at night, wrapped them around his mail box. I never saw a can on my lawn after that.