I don't see where anyone has proposed we "ban" any words at all. What I see are people who suggest that we use a different set of words, that accomplish the same ends as "master/slave," except with words that aren't associated with slavery.

> "Masters and slaves have always existed in human history and will probably always exist"

I don't understand this argument. I'm not saying your statement is wrong, but I fail to see how this is a justification for using the words in a technical context.