Like most things in this country, people turn a blind eye to things, or think I'll let someone else deal with it. The more vaping that happens on trains, the more others will be emboldened to do it. It's VILE, end of. Not enough research to know what effects it has, or what chemicals are produced when exhaling clouds which others are forced to breathe in. Imagine what would happen if a dodgy batch of vapes were released...lots of portable bio/chemical weapons. Yes, that may be hyperbole on my part, but the threat is there.
I went off of someone vaping on the Elizabeth line in a rather crowded carriage. I felt very embarrassed after as it's out of character, but the idiot did stop- I was more concerned about getting stabbed tbh. Edit: Buses are worse...in such a confined space...Gives me travel sickness.