I did show one of them how to get into the yard so they could do that and reassured them that I'd far rather they just retrieved their balls on their own than pester me about it, though I can understand not wanting to trespass on stranger neighbor's property, especially if you're a person of color in America not wanting to get shot (I have no intention of owning a gun and wouldn't shoot a kid getting his ball back even if I did, but I know that's not universally true).