Nate Anderson Do you really know how your various friends, relations, acquaintances, and hangers-on plan to use your Internet connection when they drop by and ask for "the Wi-Fi password"? Unlikely—and yet anything that they do illegally through your home network can bring cops to your door with search warrants, asking tough questions about child pornography. Case in point: Marin County, California, just north of San Francisco's Golden Gate Bridge.