How can neighbors get back at their neighbors for littering?

Get some newspapers, go to the park, get some dog poop, wrap it in newspapers, and prepare a pot of water at home. Make sure someone in his house is in front of his house, light the door and go home quickly. Don't let him hear it. When he opens the door and sees the fire, his first reaction will be to step on it and let him open the door at this time to see the situation. Take water to put out the fire at once and pour it on him. He will say thank you .. The hardest thing is to go home quietly after opening the door, otherwise the consequences will be very serious. I hope to adopt.