F14 AMI passwords

[Pete Zaitcev]

Looking at the /etc/shadow in our official AMI ami-6e3a6a2b, I observed
that root and ec2-user have passwords. Why are they left in? I suppose
they do not hurt much, since sshd_config sets PasswordAuthentication
and PermitRootLogin to no. Still, I'm just curious what they are.

Even better, let's think in reverse: if the creator accidentially
used a real root password, can I crack any interesting servers by
cracking the root password and then applying it to bits of Fedora
infrastructure (I know it's not 3-DES anymore, but still)?

-- Pete