That's a good point, but I would argue that publishing an altered version of something someone else wrote is a bit different from publishing something you wrote and standing by whatever your intentions were when you wrote and published it.
Sure, but it happens all the time. There are no end of abridged or edited or childrens' versions of "classic" books available. I can remember learning to look for the word "unabridged" at a fairly early age. As long as the consumer is informed of that modifications have been made, I don't really see a big issue.
--Justin