Originally Posted by mizzou65201
As to your first question, almost definitely not. Existing case law on airport screening states that once passengers enter the screening process, they must continue until cleared, else criminals would have a "guaranteed means of exit" in the event they were detected.
If one agrees that the screening process starts when the ticket is printed, then one already has a "guaranteed means of exit." They don't have to enter the security lane if their ticket says SSSS.