This is a very difficult issue to draw a conclusion from.
On one hand is the extremely disturbing action of government agents forcibly restraining citizens and, against their will, drawing their blood for sobriety tests. There is something almost Orwellian about that.
On the other hand is the extremely lethal problem of DUI. This irresponsible action kills and maims a lot of people, including children, a circumstance which is sufficiently serious to justify forcibly administering a blood test -- but only if the officer recommending the test is absolutely certain the subject of the test is intoxicated.
According to the report I read, every situation wherein a DUI blood test was forcibly administered the subject was found to be intoxicated (positive). In view of this comparative level of certainty, opposition to the forcible test might be reconsidered if a compensatory payment of $5,000 was automatically awarded, along with appropriate apologies, to any subject of a forcible blood test who is found to be negative.
I am sufficiently confident that the average highway cop is perfectly capable of telling whether someone is intoxicated or not just by talking with and observing his/her behavior, looking at the eyes and smelling the breath. I know I can easily make that determination and I'm not a trained, experienced cop.