DNA database is going to be delicious for profiling the population. Which is exactly what they'er planning to do even if they havn't written it down anywhere. Just think of the power you would have once you've identified that gene sequence a means you may be a murdered, sequence b may be gay, sequence c pychopath. Then you can use that knowledge, have special programs move all the people with specific sets off to a special school, other types to another school, ban sections of the populace from travel.
But where would a dubious government body want people with a disposition to brutal murder, once properly conditioned, would you want them in Jail, or would you want them in a board meeting in another nations prime corporation? Would you really want to educate someone with rebelious tendancies even if they may be a genius? How about letting mentally ill people have children? The USA had a policy of neutering people before ww2...
Somewhere, sometime, the line between science fiction and reality may very well blur in this arena, what comes out may be quite worrying.