In one suburb, a backlash against homeowners renting out private pools

Parents shepherding swimsuit clad tots toward a backyard birthday party. Peals of laughter from kids running past an open window, wreathed by blowup floaties and wrapped in dripping towels. The splash of a cannonball in the deep end. The sounds of summer fun ripple up from ads for Swimply, an app that allows homeowners to rent out private pools to strangers looking to enjoy cool water under the hot sun.