Well, are we talking about vaping or smoking?
Is smoking a health risk? Yes
Is SHS, the basis for smoking bans, a health risk? Maybe, definitely not as high a risk as we've been told.
Is vaping a health risk? No, not until someone definitively proves otherwise.
Is SHV a health risk? LOL see above.
So yes, it IS ignorance, ignorance of the facts about vaping. Ignorance of the fact that vaping IS NOT SMOKING.
Cancer did not cause the ridicule of smokers, the systematic demonization and government funded ostracizing of smokers did that all on it's own. Think about any other form of cancer, do we ridicule women for having breasts? Yes, smoking was a choice, and if you're vaping you've probably made the choice to be healthier, so why subject yourself to the same ridicule.
Again, I am not advocating vaping anywhere you want, however you want, ignoring rules/laws/common courtesy. Being courteous of others and your surroundings is common sense, voluntarily restricting yourself due to the ignorance of others is nonsense.