I have thought long and hard about the mantra 'if you have nothing to hide, you have nothing to fear'. This is sometimes used by proponents of ID/CCTV/DNA databases etc. It is not something i have ever felt the need to use.
Opponents of databases etc always sneer that the simplicity of this statement shows the simplicity of the proponent's argument and sometimes of the proponent. But this statement is not useless because it is wrong, it is because we ALL DO have something to fear.
It all stems from our deep seated fear of a 'snitch', 'grass', 'do gooder' etc. Even people who argue - both right and left - about the utmost importance of law and order are suspicious of people who 'shop' criminals, even if they recognise it is the correct thing to do.
Opponents prey on this anti-authority streak to advance their cause. Sometimes they are right, but sometimes they throw the baby out with the bathwater - think of Greens and nuclear power and unions who resist new technology and more efficiency. In the end they just hurt their own cause.
I am convinced that NO2ID and opponents of DNA databases ultimately will realise they have unwittingly damaged the cause of liberty and freedom. Deleting innocent people off the DNA database is a backward step when for fairness and accuracy we need to dna everybody. Only then will our justice system be able to become less punitive rather than an unfair hit and miss so called deterrent system.
*update* Jonathan Myerson writes in the Guardian on this very subject.