I'm really conflicted about this poll for a couple of reasons:
My husband vapes a few juices that have a very unpleasant smell IMHO. True, it doesn't last long, but I could easily see someone objecting. This wouldn't be a problem in the waiting area, but in the confined space of an airplane even a person's bad breath or BO can be very uncomfortable for people in a confined space.
There is a LOT of ignorance out there about exactly what eCigs are. We experience and read often about people having coughing fits from the eCig vapor simply because they THINK it's cigarette smoke. This will go away as people learn about vaping, but in the meantime, who needs a nasty scene in an airport where people are already nervous? Maybe we could help the cause by not calling them eCigs, just get rid of the "cigarette" label completely. I've taken to exclusively referring to my PV and even avoid the word smoke. I vape my PV and never smoke my eCig. To be considerate I don't hesitate to ask permission to use my Personal Vaporizer because even if they say no, at least I've made a point and possibly educated them a bit.
Although I don't believe vaping in a plane is harmful to anybody, for now I would stealth vape inside the plane if I had to, or simply go into the lavatory to avoid problems. A smoker could never get away with that!