I believe we need to be proactive about the security of our systems. Also, I think Fedora fully uses SELinux for all of there default desktop applications.

Security should not be an add-on after the fact. We also should endeavor to make sure people's first reaction is not to turn it off. Fedora has failed at that with SELinux, many guides have that as their first step after installing.

This would also require a GUI for notifying a user of a security breach (and allowing them to allow it?)