Happened to my coworker: kids were playing outside and a neighbor called the authorities on them. Not clear if they really thought the kids were in danger, or just did it out of spite, but what ensued was a nightmare of CPS calling the workplace and a few follow-up house visits. The sad part is everyone involved can turn around and claim "we were worried about the children" and use that as a shield for whatever overzealousness or maliciousness may hide underneath.