Uh, you CAN'T bring lighters, filled or unfilled, onto planes these days. Ironically, nail files are generally approved - but if they are long and sharp, they will probably go bye-bye. And it varies by country (and even airport) as well - I've traveled with a small corkscrew (screw goes into the plastic cylinder that also becomes the handle lever) in the US with no problem, at London Heathrow it was confiscated and I was lectured last week. I guess they use corkscrews for different things in the UK...

For easier flying, whether you agree or disagree with the rules, get a copy of the latest information (PDF from the TSA) of what is banned.