What about matches?
It says that they are probably next, but they don't know how they could find matches other than through physical searches.
Yeah, how are all those sick people in California going to get their medical marijuana started up???
Well since you can't smoke on any US airline, why would you need either?
Butane lighters tend to flare at altitude, if turned up to high, they can throw a 1 foot long flame jet at altitude.
(Planes are only pressurized to an effective altitude of 5000 feet).
I suspect there is some intelligence (beyond the shoe bomber) to justify this.
Is a piece of flint and a small rock legal??