I think the smoking/vaping warning would be for the benefit of the parents of a younger demographic than the crusty denizens of PE.
I wish this warning existed for my house: Warning, this film contains outdated notions of sexism and misogyny that will outrage the feminist in your house and you'll hear about it throughout the entire film. I tried to watch Support Your Local Gunfighter last night and yeah, certain aspects weren't playing well with my wife.
Bookmarks