I hadn’t really paid this incident much mind, TSA harassment and their subsequent tight lippedness is almost getting to be a non-event. Admittedly, their posting of the surveillance video quickly after the fact is somewhat novel. Having watched it, I still tend to think the truth lies somewhere in between. Characterizing her actions as defiance seem a bit strong, to me. Intentional, sure, but it looks more like an absent minded pour and shake then some rebellious gesture.
Regardless, Bruce Schneier has a write up that finally caught my attention. He lines both sides up in parallel so you can more clearly draw your own conclusion. What I really liked was his quick observations on the psychology more broadly at play here. Regardless of the question of indignity or defiance, this unambiguously points out the need for transparency and accountability to be restored.