If there is no risk of “second hand smoke” i don’t care.
Except it is the same as any “drug” or carcinogen (marijuana) ..later on when the user has health issues they should not be entitled to health care...live with your choice or quit.
Although, i know that is not what will happen..As it always is...other people will pay for other people’s poor choices.
The Euros has a much different approach to vaping - they generally say it’s much better for a person to do light vaping than smoking actual cigs.
There are no carcinogens in legal (nicotine) vaping products, that is why it’s a harm reducer.