**EMBARGO: No electronic distribution, Web posting or street sales before SATURDAY 3:02 a.m. ET May 19, 2018. No exceptions for any reasons. EMBARGO set by source.** Ann Sheridan, director of violence prevention at 360 Communities, at their Lewis House facility in Eagan, Minn., May 17, 2018. As digital tools that gather cellphone data for tracking children, friends or lost phones have multiplied in recent years, so have the options for people who abuse the technology to track others without consent. (Jenn Ackerman/The New York Times)