Actually, there is, although you have a very valid point when it comes to DNA. If the DNA is collected, sequenced, and banked, with no identifying information, the identity of the person from whom the DNA was taken will remain unknown - unless that person offers up another DNA sample later in life. If that sequence (the second one) also gets entered into a searchable database, you could match the two up and identify the source of the original DNA.
The problem is that DNA is so easy to obtain, amplify, and sequence, such that it would be very hard to avoid having your DNA information ‘harvested’ if someone wanted it. I'm not sure what the answer is. Theoretically, it would be possible to develop a person-specific biological weapon if you had their entire DNA sequence.
“I’m not sure what the answer is.”
Actually, as I think about it, if you want to remain anonymous you should do 23 and me, and other DNA databases, as many times as you can afford - always with the DNA or multiple other unrelated people. That way the true DNA sequence associated with your name will remain unclear. Of course, if one of those people commits a crime, your name will be associated with it.
Excellent and informative response!
Thanks