I'll qoute myself here:
Originally Posted by
AllTheNamesWhereTaken
Can you get it in a form that does not look like a cig? Maybe bright pink or something, then it won't look as if you are smoking.
Of course, when you get of the plane you can switch back to the cig looking one.
If you can sit in a non-smoking bar/restaurant with an e-cig, why not on a plane? You don't have to exhale, so it won't look as if their is smoke, and there will be a notable lack of smell. The person sitting in row 25 is not going to notice, or be inconvenienced by the guy in row five with his e -cig. Of course you can also apply common courtesy and inform your seatmates that you would really like to use your e-cig, if it would be okay with them.