Most likely if you refuse to go through the scanner they will. Or if they see something particular such as a packer out of place or an stp. Good luck it completely sucks.
I have a more of a temper then I use to as well. You just have to take the moment to stop and ask if you really want to deal with consequences of what you are about to do. Take a deep breath and count to ten. Walk out of the room if you need to or drive away if that's what it takes.
