There's a difference between 1) Walking through a metal detector, putting a bag on the X-ray machine, (after being asked) walking up to a guard with a wand for hand screening and at that point refusing to be scanned in an effective manner; and 2) walking through the metal detector and (after being asked) refusing to be scanned with a wand and then continuting to walk toward your gate.
In the first instance, you'll be refused entry, as Ms. Oden was. In the second instance, you'll likely be detained and the local law enforcement personnel will likely pay you a visit.
Bill (IIRC) pointed out, regulations say you have a right to refuse personal screening so you won't be arrested for #1. You'll be denied entry, as she was.
Your challenge seems to be closer to #2 than #1.
If she refused to be screened, what would have happened?
What would happen to you if you attempted to enter the secured area without being screened?
Did this happen to her?
Did she attempt to enter the secure area without being screened? I've seen no evidence of that. It seems to me, her actions were closer to #1. She apparently interferred with effective screening of her person, so she was denied entry.
My $0.02.
Cheers,
Scott.