Longrider (which I found via Devil's Kitchen) has a superb fisking of Tony Blair's article promoting Identity Cards. This is the key passage. Words I wish I had written.
Let me make this clear; my identity is just that, mine. It is not yours, it is not the state’s, it is mine and mine alone. It is up to me to decide who will be privy to information about that identity. I will not, absolutely not, be fingerprinted like a criminal in order to satisfy your obsessive control freakery. This is not negotiable……We are opposed because they will make minimal or no contribution to the prevention of terrorism, illegal immigration or whatever the problem du jour is, while causing maximum inconvenience and invasion of privacy for the law abiding citizen. They will reverse the relationship between you, the representative of the state (servant) and us, the electorate (master). I recommend that you remind yourself of this principle. I do not intend to serve you or prove to you who I am, because it is none of your business.