I'm not sure it is a minor detail when the entire basis of their argument isn't factually true. You can tell people that they can't vape. That is entirely fair as it is your property. With that said, exaggerating the point doesn't help anything. You don't get people more on your side by raging against vapes without any facts in hand.

The second hand nicotine from vapes is a problem. The potential for them to explode and hurt people is a problem. The list goes on all the way down to people can be very allergic to the flavors and you can't have that in your car. No is a complete sentence, but there are real problems you can use instead of raging about something you can disprove on Google in 5 minutes.