Devices known as Stingrays, which can secretly track and record phone users by mimicking cell phone towers, have been a hot topic in law enforcement and civil liberties circles for some time. Now, the FCC is set to take a closer look at who is using them. In a letter reported Monday by the Washington Post, FCC Chairman Tom Wheeler stated that the agency would create a task force to examine the threats posed by Stingrays, which is the trade name for a technology known as “ISMI catchers.”