If you don't comply you can be fined, see section C of:
http://www.tsa.gov/assets/pdf/Sanction_Guidance_for_Individu...
(refusing to be searched violates a number of those provisions which adds up to $10k)
And you're not allowed to record in TSA sterile areas, there are signs at airports that say so.
I'm not saying I agree with the law (note I wrote 'good' case above), but your point that the TSA website says otherwise isn't true, and it's a shame I've been downvoted for it. Perhaps you'd like to edit your comment with the url on tsa.gov you are referring to?
The whole point of what I was saying, which you missed, is that if the TSA wants to make this case into an example case to set a hard line against those who don't want to do back-scatter, those videos are going to be damaging to him.
http://www.san.org/documents/corp_serv/Codes/Article%207/Cod...
I'm not aware of any major airport that lets you film secure areas, which is the point I'm trying to make - and so that could just get rolled up into a civil case against him. Which is the point I'm making.
http://www.flyertalk.com/forum/travel-safety-security/938543...
Some allow it but I'm pretty sure none (or close to none allowed) photographing the xray monitors.
The point is if this does go to court the videos will sadly count against him if they decide to throw the book at him.
EDIT: you are not allowed to film at TSA check points because of airport policy, not because the TSA policy. for San Diego see:
http://www.san.org/documents/corp_serv/Codes/Article%207/Cod...
I'm not aware of any major airport that allows filming in screening areas, which is the point I'm trying to make.