Sometimes this is a opportunity to educated. Sometimes you just laugh and walk away. Either way, you made a point. 
"I read it on the internet", "the government said", and "I heard it from a guy in a bar" should be added to the world's greatest lies.
a while back I was vaping outside a mall... still had stinkies on hand at that point... and this guy asked me to bum one (he though I was smoking).I've had a smoker with a cigarette hanging out his mouth telling me how dangerous it is because "we don't know what ingredients an ecig has"
i simply replied, "yes, correct, we know exactly whats in the cigarette handing out your mouth and that its 100% cancer guaranteed"
always remember, people are sheep, they will listen to anyone and simply regurgitate that info without checking it out themselves.. of course all the anti-ecig news that come out from big pharma, don't help the situation either...
The couple times I got that response to my vaping I said, "where did you find that information, from a headline on the internet?" and both times the respondent sheepishly remarked "yes" and I educated them a little.
These are the same people that will vote against us in electronic cigarette matters.The ignorance some people have to vaping is incredible. I find that most people that are "against" vaping are also uneducated on the subject. You just have to shrug those kind of negative people off
I've only encountered good things with vaping, I could not believe the nerve of this guy an he is a someone's on top of it of it. My boyfriend later pointed out that the guy was a just trying to talk to me as I argued half buzzed about how,I know where my juice comes from and blah, blah, blah. It's very frustrating for a newbie who is still struggling with smoking to take heat for vaping.
I'm seriously so upset and blown away.
These are the same people that will vote against us in electronic cigarette matters.
Or at the very least not vote with us or to help us.
I would never shrug them off.
If someone comes up to me telling me about how dangerous vaping is, they going to get some serious edumacation...
Not only about the relative safety of vaping, but about distrusting the media, and the powers that want to take my electronic cigarette away.
Maybe we shouldnt be mad at the dumb person, but we should be furious at the disingenuous, lie factories we call 'the media'. These networks are cowing to big tobacco and being flagrantly dishonest to the american people. From cable stations all the way down to local news channels, they are LYING TO EVERYONE.ahahah, this topic has been beaten into the ground by this point, hasnt it? nobody should hold frustration or anger toward people like that. you cant change anybodys mind. its human nature.