Many of our ethical debates are falling short of knowledge of available technology. Will we really resist such chances to deter and detect rapists, terrorist and so on because we blanch at the thought of a total database of DNA? We have also discovered the Boule gene which controls sperm production in all known animals. This makes is a sure target for male contraception, not just in humans but also pest and germ-carrying species. The implications include the thought of suppressing target populations without their consent, such as whole countries and criminal underclasses.
Not nice thinking I know, yet should we not try and have the best debates we can before the technology just overtakes us, as it does?