Post them as they are, but be thoughful in titling threads containing them-- not PC, but thought-full. In your post, before the song itself, you can say what you need to say about its lyrics. Post your edited version too in a separate post, but don't revise history.
When can we revise history? When we are big enough "folk stars" to have recorded our own version, and are posting THAT body of work-- a new piece of history, actually, rather than a revision. But even then you would do well to post the original your work was based upon, as well, with your reasons for changing the lyric in your own performance.
Nothing you do about this is going to be the right answer, BTW, because this is an area in which humankind is still burdened by a host of confusions. It's confusing because it's confusing-- it will not make sense no matter how much you tug at it, because at its base is hurt and wrongness from all sides, and these just don't make snse because they don't make sense.
Just be as smart as you can be on any given day, and move on from one day to the next expecting that of yourself. We've met in other threads, and I respect you for what I have seen of you here and at your own site-- I think you can be trusted to make good decisions.
~Susan
PS I AM still working on that damn Charlie Poole project! Why'd he have to do so MANY songs anyhow????