[Fedora-livecd-list] LiveUSB Security Updates Only

[Grant Williamson]

Is there a simple way to set the default on a Live USB install to only 
install Security updates.

I know using the yum-plugin-security and yum update --security is one 
way, however for
Joe Average is there anyway to set this as a yum default, so that even a 
yum update and or PackageKit will not prompt for additional updates?