A lot of these default passwords on non-consumer devices aren't user admin accounts but tech support accounts. So #1 and #3 don't work, because the user doesn'

A lot of these default passwords on non-consumer devices aren't user admin accounts but tech support accounts. So #1 and #3 don't work, because the user doesn't get the password. But there is also a 4th option, the user somehow enables the support account.