... be afraid! ... your DNA is stored until it's needed!

First sthe chip with stored dates will be in ID-Card or drivers licence, that will lead to misuse it. Than it must be put under your skin, to prevent abuse.
And we have all the best pre-condition for euthanasia in every believable or unbelievable form!
If Hitler had such a tool, maybe those scientists never were been able to research any - maybe their parents not were having the cleanest DNA. One of your ancestors was an arab - terorist! Or slavic - spy and terrorist! No way to study or take an important job for whole life.