Now, an interesting question is, what happens if everyone knew almost everything? This is the alternative scenario. If the end of privacy is more ubiquitous and democratic, the power of the secret services would shrink. It might lead to a change of our laws and social norms to something that more realistically represents our reality.
I'm not optimistic that this would be a good or even better world, but this is the best argument I've heard from the people who are not afraid of the end of privacy. I would count Mark Zuckerberg and Eric Schmidt into that group, but also many of my friends.
Which norms and laws would change? I can imagine that e.g. the use of certain drugs like cocaine and sexual behaviors like sado maso and yes prostitution would be the first to be tolerated by the majority. In some societies, that is already the case. A more difficult to swallow reality might be pedophily. I'm quite sure that child abuse would always be unacceptable but simply being pedophilic might be accepted as normal for a certain percentage of the population.