So all you have to do is get your family, stand in a straight line, and walk up and down over the lawn picking up any stones that you find. Like they do on aircraft carriers.
Fun for all the family, of course the neighbors think you're a little weird.
Hey, I come from an army family: it put food on our table and gave one of us a degree, finally. But even back then, with an autocratic family life, there was still NO F'N WAY dad was gonna succeed in lining up the family to walk in a manageable line across the lawn and pick stones. Maybe we'd line up, but the work wouldn't be that good because #teenager
Yes, my neighbor installed a cute post fence so the previous tenant would not drive his truck over his lawn. The fence has a gravel base. I get rocks on my lawn across a two car wide driveway. They sometimes manage to fling from under my lawnmower at crazy speed aiming at cars and people randomly. It happens so rarely you get to let your guard go and then BAM.