What if they ask for your liver?

If you were pulled over at roadblocks this past weekend in Alabama, chances are you were asked for a DNA sample.. AL.COM is reporting that St. Clair and Bibb County residents who were stopped at several roadblocks set up and were asked for a voluntary samples of blood and DNA (for a study, according to the report) .. a study.. hmm.. were they studying something for scientific research, or were they studying how far they could make innocents motorists go in giving their own blood and DNA?