And just what are they going to do with it? Target me with a biologically engineered virus? I'm shedding DNA with every breath. Your DNA is currently private thanks to security through obscurity, but if you've ever watched GATTACA, that security will disappear as DNA testing becomes faster, cheaper, accurate, and ubiquitous.
People really need to get over paranoia over this and focus on what matters: laws against discrimination based on genetics.