matt76, I am OK with folks coming onto my property so long as they aren’t damaging anything, leaving a mess, or doing anything illegal. A baseball field on private property is a bit unusual but it predates me living here. It is mostly used by a kids league,and they maintain it. There is as well some casual use by others for a variety of purposes, and sometimes I see folks using the hay field off season to let dogs run around for example, and now the kids with the drone. A bit of a cultural time warp here I suppose.
Coming back to the drones, I will keep an eye out so as to determine who the kids are/where they live. Part of what I have done is make mental notes of who has what skills or assets should the SHTF and we as a community need to come together for mutual aid and support. Knowing someone here has a drone could come in handy.