People believing such a thing probably don't understand the fundamental nature of reality. Everything forms a web of causality; all your actions spread outwards at the speed of light, affecting everything else around you. Quite often one can correlate back those effects to their original cause. This is what science does - figuring out new ways to correlate observations with their causes. Progress of technology only means we're getting better at it. I don't see how you can revert back to the pre-industrial levels of privacy without rolling back the industrial revolution.

When people serve their time we let them out of prison. But it also doesn't mean people may not still be afraid of them because of what they've done in the past. You cannot lock someone up just because someone is afraid of them. "If they do it again he will go to prison" isn't exactly comforting.

As my father would happily point out, you cannot always lock someone up for being an asshole. Not all asshole behavior is prison worthy. But that doesn't mean that I want to have to endure it because I have an unpopular point of view.

No, I don't think Marijuana consumption should be illegal. If I did it, even if it were legal, I would probably not particularly care to have everyone in the world know about it. That said, making Marijuana legal will do little for the black community. The problems are much deeper.

Bringing up a 300+ year long struggle against oppression isn't exactly a point in your favor of having no privacy.