Re: Who cares if it isn't harmful? some pople do
Everyone who is walking in front of you is belching out carbon dioxide and water vapour. You can even see the latter on a cold day. The fact that you can see vaping fumes does not mean that they are going to cause you any harm, and the smell is less than you get from the breath of a coffee drinker, and a LOT less (and more pleasant) than you get from a person who has had a curry or garlic meal.