Granted, it's not much, but I did this under an assumed name and declined to allow them to keep the sample. I think it's good that the DNA is being used for science, I just hope I can keep some privacy from it.
I take your point, but the only family I have is my wife and children. My entire lineage has weathered on the vine from everyone dying and not having children. Outside of that my nearest relative is a second cousin once removed. I'm in a unique situation, but I take your point that it could still be identified down the line.
