In an answer to this question, Tobi posted an image of a few lines of text, and then, blurred and with a slight skip, the lines of the text that appear on the backside of the page, in reverse order:
The bottom picture, then, is how it should look in a printed book: The lines on the backpage exactly the same height, so they don΄t shine through.
In the discussion of the question, alas, it turned out that an automatic solution is rather difficult, and that a lot of manual editing is still required. The question I have is therefore slightly dumber:
Is it possible to produce the depicted effect of a blurred backpage with LaTeX?
In other words: Is it possible to reduce the difficulties of automating the line-positioning, but to give the typesetter a certain amount of overview by the means of creating the PDF a little more as if it were a real book?