The problem isn&#x27;t that they&#x27;re collecting DNA, it&#x27;s that they&#x27;re linking it to an individual for future identification.<p>Sure, I left my DNA all over some place I visited, but nobody has any idea who &quot;I&quot; am based on it, in the same way they don&#x27;t have my fingerprints on file.<p>EDIT: Also note the DNA of everyone born after 1983 in California is on file.