Does she think that terrorists hop on planes and then live-blog their intentions dead-tree? What sense would that make?
Maybe she thinks that terrorists board the plane first and then work out the physics required to sabotage the flight en-route.
Or does she think that math itself can be used to control airplanes from the passenger seat?
I guess this is the increasingly less rare intersection of ignorance, abject stupidity, and irrational paranoia. I'd be pretty angry with this passenger for being so stupid, let alone delaying the flight and wasting fuel.