As law abiding citizens I think we have a lot to fear of a DNA database. For example:
1. The UK government seems to be good at 'misleading' personal information these days (lap-tops, dics etc).
2. A DNA profile is an awful lot more than a fancy fingerprint - it could be used for many other (potentially dubious) purposes.
3. As genetic technology advances in leaps and bounds, acquiring someone's DNA profile could be, in the future, the ultimate identity theft.
4. There is the belief that DNA evidence is unequivocal proof of a crime. This is dangerous. As the techniques get more advanced, less and less genetic material is required to get a DNA profile. Such tiny quantities that it starts to become possible that tiny fragments of your DNA could be detected on people you've never even met. Scary.
5. Sharing your information with other countries/ organisations that may have dubious and prejudiced motives.
6. Most importantly (in my opinion), infringement of your human rights and loss of control/ independence. My body is mine, I decide if I want to donate my organs after death. To not be the owner of the basic code that makes me me is beyond comprehension in my book.
This aggression will not stand!