I use a Kindle, but never bought a single book from them. I mostly use their transfer method for convenience instead of looking for a cable. As for books, I downloaded a few gigs of ebooks in html/RTF/doc format well before e-ink was invented, and use those with calibre to convert to epub. Pdfs are rather suboptimal for ebooks.
It depends… Are we speaking about keeping only tall blonde kids? Or aborting a fetus with 95% Down syndrome? Angelman’s? Some other even worse? Stopping a possibility fatal pregnancy? Where do you put the line?