To get rid of continuity-breaks and surprises being spoilt by seeing the prequels before the original trilogy, not only would the name Skywalker have to be get rid of as well as the name Vader and his contruction-scene, as well as the sight of the pregnant Padme... but also every picture where Yoda is being seen as a Jedi.

I think all this would take too much out of the movies and it would be better to just watch the original trilogy first and then the prequels (of course in the form of a good fanedit).