In that case, if it's a genuine threat, then freezing the account isn't the right action, notifying local law enforcement is. Beyond this, by hiding the commen

In that case, if it's a genuine threat, then freezing the account isn't the right action, notifying local law enforcement is. Beyond this, by hiding the comment/post, the mother is now unaware of the threat and Facebook didn't contact local law enforcement in fact worse than doing nothing at all.