There's more than a few Warner Brothers cartoons that you never see any more, too, because they promote violence and/or racism and/or whatever...even though, in the context of their time, they're sheer artwork.
Personally...I think it's all just a little too Orwellian, editing past culture to mold present social mores. Better, I'd think, to keep such things as-is and say "This is how society WAS", rather than change them to reflect "This is what we want society to be". Unfortunately, that's only effective with smart people, and not Americans...