I agree, I don't like my data out there but the benefits of knowing your mutations and risks are very valuable. I don't think they sell your name, just the data without personal identifying info.
Where this will go very bad in the future is if/when insurance companies start requiring DNA test and subject people to higher premiums if they have xyz mutations.
that being said, if you are very concerned about
your dna data being tied back to you, I guess you could use an alias on the test req
Patient name: Borrelia Bart