The last few times I've flown I've carried a bag of pork rinds in my carry-on.
The plan is to look around the waiting area. If I see someone I deem suspicious, saunter over, break out the rinds and see if I can gross them out.
If possible sit next to them on the plane just to let them know they might get pork on themselves if they detonate a device.
Yes I'm serious and no, haven't felt I needed to use the plan.
That is actually an excellent plan. Sounds silly to sensible people but is incredibly powerful to islamist fundamentalists.