Make no mistake about it: because of today’s decision, your DNA can be taken and entered into a national database if you are ever arrested, rightly or wrongly, and for whatever reason. This will solve some extra crimes, to be sure. But so would taking your DNA whenever you fly on an airplane … (or) taking your children’s DNA when they start public school.
Via Scalia dissents from conservative bloc in Supreme Court DNA decision @ Blogging Blue.