There is no crusade. However, most people who are vaping into public airspace are in fact using nicotine with a very high degree of correlation -- this is not something many people do just to taste 0-nicotine air flavors. This started off by saying "vaping is probably safe, because similar things are used for special effects at concerts". In this case, there is at least one factor not included in those concerts - the drug most people are obtaining through vaping.

They say "this is safe", while ingesting a particularly evil toxin that is lethal in very small quantities (like a drop or two will make you violently sick). Yes, there are other toxins, but ... again, this is perfectly avoidable and nobody has any business making others who do not choose to be exposed to it.

People should have the right to not come in contact with that.