Kids will be kids, but also petty neighbors will still be petty! In fact, there is perhaps no greater rivalry than a group of rebellious kids and a disgruntled adult neighbor with a knack for being petty. We empathize with this neighbor's predicament here because not only were these kids repeatedly littering just for the fun of it, but if their parents weren't going to teach them a lesson, who was? If not now, when? Am I right, reader? This dude started to discover piles of trash on the sidewal…