Unless vapers (vapists?!) are going to get their own carriage, it is a totally selfish idea. I would (if I could) also ban folks from wearing cologne on aeroplanes- I had the misfortune of sharing an 8-hour flight recently with a large Spaniard who appeared to have taken a bath in Polo...! Simple consideration for others would solve it- in carriages or metal tubes, have a shower before you travel, no fags, beer or vaping, if you have to fart repeatedly, do it in the enjoyment of your own company in the loo, and keep egg butties in your bag till you arrive at your destination!