Nor does law enforcement, for that matter. Operating a Stingray-like device to capture cellular user information is very, very illegal in the United States with

Nor does law enforcement, for that matter. Operating a Stingray-like device to capture cellular user information is very, very illegal in the United States without proper authority to do so. Even capturing open Wi-Fi that you do not control is legally perilous and has divided courts on its legality, which seems counterintuitive on its face given the simple physics of radio, but is a fact. It’s stupidly simple to run afoul of the CFAA and federal wiretapping laws, not to mention the expectation of privacy standard in California.