根據wikipedia,在自吹享有幾乎絕對“言論自由”的美國,自1915年以來,有32套電影被某些州份禁止上映,原因多為色情、暴力之類。在1949年,有一套叫“The Lost Boundary”的電影被某些州份禁影,原因為:
"... liable to "create dissension and strife between members of the white and colored races, and would be likely to cause disorders, disturbances, and clashes between the races."