There was a time when it was considered cool to smoke in films, but now it is to be censored along the same lines as sex, violence and swearing – suitable only for over 18s in America where it will be R-rated.

As the non-smoking film maker Marshall Merskovitz points out,  the world is filled with terrible things that can influence children, but should every terrible thing warrant an R-rating?  We are surrounded by many of these terrible things.

“The problem is that excess drinking is a terrible thing and also kills millions of people a year. And influences young people. Driving automobiles irresponsibly is a truly terrible thing and kills tens of thousands of people a year and influences young people. Guns are terrible things. Sexual harassment is a terrible thing. Robbery is a terrible thing. War is a terrible thing. Being mean to other children is a terrible thing.”

The film industry said the move demonstrates its growing commitment to reducing teenage smoking. If Lois Lane lights up, for example, a movie that previously would have earned a PG-13 rating, based on its levels of sex, violence, and vulgarity, might now get an R –rating and a warning to parents that the film glamorises smoking.

The cynic might say that Mersckovitz knows his films will lose money if they can’t be shown to wider audiences. Will it mean the kiss of box-office death?

While not wishing to promote teenage smoking, I think this censorship is going too far, that children’s main influencers are in the home, their school and neighbourhood.