How much is it worth to you to be stopped and quesioned? It's not worth my time/effort - my travel case, cutter and lighter (el cheapo) goes into the checked luggage. And every once in a while I have had my lighter and cutter confiscated (even though they're not supposed to).
I would think a bottle of butane fluid would be a definite no-no for carry on. I'd suspect they may even react to it being in a suitcase, if they were to find it...
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