Not asking if the smoking itself is unreasonsble (clearly it is, indeed afaik it's illegal now?) but if you saw it would you say anything? My DP does. I do respect him for speaking out (fwiw he does it whether it's a man or woman) but worry at some point he will end up on the end of some one aggression...last time he said it to a bloke at traffic lights he got called a cunt and told to watch himself.
So is he BU to do It?