Turn off Quick Add in Snapchat

The Quick Add feature in Snapchat allows friends of friends to find and add each other more easily in the app. While this is convenient for genuine connections, it can also be used by bad actors if they hijack an account. Turning off Quick Add will prevent anyone finding your account via your friends. It also stops anyone in your friend list or address book from being able to find your other contacts. You can turn off Quick Add in the main Settings of the app.