There's no onscreen evidence that "droid rights" is a burning issue in the galaxy. A droid spartacus is an interesting idea, but that could end up being like The Matrix's backstory, or a really preachy TNG episode.
I think the CW series has at least touched on the issue of clones having rights, but we don't know how many are still around in the OT.
Han was warning Wookiees are bad losers, not advocating forcible droid arm removal. ;)