Snapchat has incorporated a phone number opt-out feature into its mobile app in response to a recent hacking incident. The change was made partially to address a data breach last week in which hackers made off with the usernames and phone numbers of more than 4 million users. Previously, there was not a way to remove or de-link your phone number after giving it to Snapchat. The company did not say it would delete users’ phone numbers from its databases if users subsequently elect to opt out.”]