Earlier quoted context omitted.
My hunch is that if this information is used against you, you'd never know. First scenario that comes to mind: The insurance company that gives you an extremely high quote because you come back as "high risk" from a 3rd party company that they use to vet applications, and that 3rd party company uses your genetic predisposition for a condition.
This requires the insurance company to be doing something illegal and for it to really cause damage all their competitors have to be doing it as well. If this ever becomes widespread, it would be quickly obvious when a large number of ostensibly healthy people are given quotes that match their genetic profile but not their medical history. I'm just not sure that is a reasonable fear.
> An employer who looks at an applicant's Facebook page or other social media posts could well learn information that it isn't entitled to have
True, but you cannot unlearn things...
So the believe in laws prohibiting information spread might need rethinking.