I don't think it's infeasible to find a technology. I think it's infeasible to change our culture to be more accepting of the sorts of things that people choose to keep private. As long as people are persecuted for their completely normal beliefs and actions privacy has a place and keeping things private is justifiable. But if I were designing a utopia I think I'd try one with no privacy at all (everyone has access to the same set of facts about everyone / everything else) and see how things go.
Why do you think my position is immoral? How is it a flawed concept? You haven't presented a logical argument for your position -- that privacy is good. I'd love to hear one that doesn't include a clause where "some bad actor does something immoral because of lack of privacy."
Maybe P = NP, then we won't have a choice :)
Edit: spelling.