Marijuana Reference
Although BORDERTOWN was passed by the folks at the Production Code (Certificate #299, according to the film's opening credits), they left in a reference to marijuana early in the film, when "La Cucaracha" is sung with its line "Por que no tiene, por que la falta, marijuana que fumar..." Perhaps they felt that since it was used in an apparently innoccuous song it wasn't worth bothering over, or perhaps they thought that mainstream America's movie-going public wasn't sophisticated enough to pick up the reference in a song sung in Spanish, or even to recognize the word.
Those of you who think you know everything should politely defer to those of us who actually do!