Got a 23andMe spit-kit about a year ago, and never worked up the comfort with turning over my DNA.<p>It reminded me that the hospital where my first was born was engaged in some sort of genetic research at the time. They requested her DNA and assured me that it wouldn't be used for, say, future health insurance underwriting, etc.<p>What really made me uncomfortable was, not only how the DNA could be used at the current time, but how it might be used in the future, especially given the rapidly-evolving technology. And, it's not only the technology that will evolve, but privacy and other laws that currently limit DNA usage might also change in the future.<p>Of course, it occurs to me that if someone really wanted our DNA, they could capture it in, say, any random blood test, etc. But, it just seems safer, for now, not to "give" it away for questionable value in return.