Well should they also provide methadone for those addicted to cocaine (as that's also a legal substance)? Or maybe an area where they can all 'shoot up' on long hauls. At the end of the day, if you don't feel able to fly without a substitute, then you should supply yourself with whatever required.
I didn't mean to imply that railways/airlines (Or whatever) should
provide such things to passengers, merely that making them available to
purchase wouldn't be a bad idea in my book.
Obviously: If I'm taking a long smokefree journey, I'll make my own preparations to make the journey easier - Such as packing a bag of penuts or sunflower seeds, or scheduling a smoke break at an intermediate station.
However, I can't see it being a problem for such "smokeless" cigarettes to be offered on board the trolley or at the buffet...And if the usual price mark-up was applied (Easyjet were selling their ones at about £5.00 for a pack of ten = 50p each) it would give an fringe revenue stream for the TOC in question, which over time might lead to lower fare increases!
Mind ye: Since travelling on Finnish trains - Which have the same smokefree rules as our own, but provide a small isolated/ventilated compartment for smokers - I have wondered why the same feature couldn't be added to our own trains used on longer distance services. That said though, the responses above suggest that I'm probabally the only smoker on this forum...