The trouble with the nothing to hide nothing to fear argument is that, even if you have nothing to hide, you may have something to fear when the next enforcement regime comes along e.g. if you share information about your sexuality, religion, trade union membership etc. All innocent enough under one regime, catastrophic for individuals under another. Be careful what you wish for, you might just get it. Law making has got very slapdash during my lifetime and there are so many unforeseen pitfalls created as a result.