Key learning:
It’s virtually impossible to plug every hole and to prevent all access, and that’s not what we advocate. We support and encourage meaningful conversations where children and families can discuss the possible pitfalls of secret conversations. By keeping the conversation open and offering your child the support and encouragement to navigate these freedoms, hopefully, they will use them responsibly.
Even though secret conversations are set to disappear, it won’t prevent screenshots and other lasting evidence of the conversation. In addition, if your child is bullied during a secret conversation and they didn’t take a screenshot, it becomes more difficult to prove.
You might have your child’s username and password, but unless you are on the device used to launch the conversation, you won’t be able to see it. The participants in the secret conversation will be made aware that you are attempting to access messages from a new device (parent in this case). You can also make a message disappear after a specified period of time.
* Secret conversations works on iPad, iPhone, and Android devices, not on Facebook.com within your browser.
Read this article from Facebook’s Help Center
Secret messages can also be set to disappear. Read this Facebook Help Center Article to learn more