I hope it's me that catches the mystery pooper and not my wife. Funny story...people would skid in front of our house in disbelief because they witnessed our dear departed Barney pooping in a bag. They all wondered how we trained him to aim so well at the bag. They missed us sliding the bag under him then walking away giving him some privacy. If I caught the perpetrator I would turn it into a funny situation and ask them to stop. I would also tell them that if it happens again I personally will even the score on their property. Trust me that will solve the problem. Confrontation was so before not now we are Southerners. If she catches them....Police Blotter...No Bail...Just Kidding!