"Tyner opted to leave instead, getting a full refund for the ticket, but not before he was told that if he left the secured area he would be "subject to a civil suit and a $10,000 fine." 
I don't get that part.  Why can't I leave the secured area when ever I please?  If I'm willing to go back thru security check to get back in, ok.  
What if I just change my mind and decide I don't want to board?  What if I don't like the looks of the plane or the flight crew?  
I must be missing something.  
Wab