No I wasn't being ironic.
Think of the benifits, someones murdered and has skin tags under thier nails, but theres no DNA for them on file, you just have to wait till you find them and match it. Leaving them clear to kill again an again.
If every one was DNA printed at birth for example, no predudice, Every-one. Then you know who did it in a few days, before they do it again.