It's to remind you all mage cc reigns supreme.
But yeah you can shut it off.
Obviously has no idea what the core of this forum post is about. YES you can toggle off loss of control alerts in interface, the issue is the Action Bars acting like I've been kicked and turn red when I sit in any CC. This, u cannot turn off. Getting Bartender fixed it for me, haven't needed ANY addons in forever now forced to use one to get rid of this monstrosity