Not a daft question, just before I crossed over to the 'Dark Side' and left rotary for fixed wing, (and with a freshly issued CPL/A in my flight bag) I was a passenger with LH from LHR to FRA in a A310 or A300. I was sitting abeam the trailing edge of the right wing. As we taxied out, I realised with growing alarm that there were no trailing edge flaps being deployed and I was unable to see the slats. I actually quickly undid my seat belt and stood up to see if the left hand flaps were out, which they wern't. I then spent an agonising time considering whether to jump up and down waving my arms like a stung turkey screaming 'stop the take-off, stop the take-off' but didn't. I assumed with a great deal of trepidation that the LH were doing the right thing and the Airbus was quite happy getting airborne in this configuration. However until the thing flew I kept having recollections of the Dryden Ontario icing accident going through my mind: 'The guy who didn't speak up'. It's amazing how we are so reluctant to embarrass ourselves.
A suggestion from a once frightened passenger to all those pilots of aeroplanes which don't need flaps for take-off, please tell us in the welcoming PA, you will have less deaths from incipient heart attacks.