Yes, absolutely.
The first concern is how that data will be used to affect the individuals themselves. It's collected under a certain set of terms. Will that set of terms be applied on an ongoing basis?
The secondary concern is that while it does reveal information about the individual, it also reveals information about their entire family, including members who may not yet be born. The ability to use genetic information to drive information about your current or forthcoming next of kin is something that we really can't predict. Genetic technology is just exploding. The actual uses are pretty broad.