This is really not very different from arguments for and against our second amendment rights to bear arms. How? We as citizens bear arms not only or even primarily to defend ourselves against criminals, but particularly to have the means to defend ourselves against ungodly government authorities and governmental tyranny that inevitably takes hold and takes root when citizens are defenseless; tyrannies are much harder to implement when those who are governed can not only say "no," but do so by force if push comes to shove. The same is true in the cyber world where privacy is concerned. About the only thing governments do well, since they are run by fallen human beings, is lie to their constituents and abuse power. The only way to ensure the government does not completely trample privacy rights, and to ensure that we remain "secure in our persons," is to a) keep our right to bear arms and to exercise self-defense with them, and b) ensure governments CANNOT access our personal data without a) properly granted legal authority on a case-by-case basis or b) our uncoerced explicit written permission. Our own United States federal government has demonstrated time and again that it lies pathologically, and if it says it will only go so far, as soon as we the public turn our backs, it will try to go much further. Material leaked by Edward Snowden has made this perfectly clear and perfectly obvious. Even if the FBI means what it says today, tomorrow it would act in pure self-interest and sing a different tune were we to permit government back-doors or the like, and likewise other authorities would follow-suit. Hardware and software engineers, and those for whom we work, must NOT permit any governmental authority this side of Christ Millennial Kingdom to have such access. If the government really needs such data or information, it will have to get it the old-fashioned way--through legitimate court orders, legitimate investigative work, etc., without putting whole societies at unnecessary risk of tyrannies, etc., which is what this is really all about.