There is a difference between identity and authentication, and that difference is lost when one uses biometric identity measures for authentication.
Great writeup on this from 2006 over at MSDN
Short version: identify and authentication must remain distinct if you want to have a system where users are held responsible for their actions.
Since this IS Slashdot, I'll ask a couple of questions: Your language is fairly judgmental - you seem convinced "the FDA" was out to hurt people. On purpose. Since that's quite a claim, can you help me out a bit here: the FDA advisory panel voted 13-4 in favor of approval. When you say "contrary to any and all expert opinion", are you excluding the 4 that voted no when using the word "all"? Or was that a bit of exaggeration?
Also, I've read several pages from the Google results and am still unclear. What is the evidence that it "maliciously held back" the drug?
Typically, as long as you have 85% or so vaccinated
Uhm, you're numbers are off a bit. At least for measles, it takes more like 95% (see http://www.ncbi.nlm.nih.gov/pubmed/20392713). Unless you have better, peer-reviewed data?
As long as most people are vaccinated you aren't likely to contract the disease, but if you are vaccinated it puts you at risk for side effects.
Also, CDC reported several hundred vaccine reported deaths in the last 10 years. I personally would rather my child have a small risk of allergic reaction or a mild illness than die. Particularly if the mild illness is part of keeping the group as a whole well, but the death my own fault.