You aren't paranoid. You should not do this sort of thing unless you have a strong medical need to know something asap. Even then, I'd have it done somewhere with a focused health care purpose, like the Mayo Clinic. I'd certainly not authorize testing for anything you don't need to know and I would not have it done with any of these big companies. Ultimately, the results can end up being used to deny people health insurance, increase their health insurance rates, frame people for crimes, or be used in ethnic cleansing or other horrible things like creating "pure bred" people with superior characteristics to "normal people". This information is not meant for Google to have.
I am disturbed that so many retirees are flocking to ancestry.com to do family trees and then willfully submitting their dna, let alone that of their children and grandchildren. It is the kids that will feel the ramifications 10-15 years from now when they can't get insurance because they are on the breast cancer or testicular cancer "watch list". Getting help will cost them a magnificent premium.
My mother and mother in law both did this without my knowledge and I find it deeply disturbing. The only interesting thing I got from it was knowledge that I have supposedly have 1% Jewish lineage. I found that funny because I was able to tell my Jewish friends that I am now part of the club. Otherwise, I just don't find it that interesting. For instance, my relatives in Italy came from elsewhere at some point but after them being in Italy for 800 plus years, I just don't care where they were before that, I'm Italian (Italian American).
Once enough people are in the database, those of us that aren't will be made out to be outliers that won't submit to the test and are hiding something. Further, the system will know our relatives results and at a minimum fill our files with that info. This is the beginning of some serious shizz that will likely have significant societal impacts.
