That is not the only warning film not to do it because people were dying all the time: https://archive.org/details/more_dangerous_then_dynamite

Some headlines of people making the worst mistake of their shortened lives:

https://www.coloradohistoricnewspapers.org/?a=d&d=RMD19330315-01.2.175&e=-------en-20--1--img-txIN%7ctxCO%7ctxTA--------0------

https://www.newspapers.com/article/wilkes-barre-times-leader-explosion-caus/13045180/

https://post-gazette.newspapers.com/article/the-pittsburgh-press-gasoline-caused-two/91356754/

Occasionally, they got lucky and survived.

https://www.newspapers.com/article/hot-springs-weekly-star-cleaning-clothes/124927252/

https://www.spokesman.com/stories/2017/aug/29/100-years-ago-today-in-spokane-woman-using-gasolin/