Or when signing up for health insurance a policy chain down the road. At that point the new treatment better be cheap enough to pay out of pocket...
But seriously, how can you in good conscious claim this all being willingly when it's very nature shares info about other people as well. This feels like unaware people giving Facebook access to their phone book all over again, thus giving away all kinds of info about me. No, I don't want FB creating shadow profiles about me and certainly wasn't asked.
Can we please find a way to not create piles of data about third parties? Since, if history has shown one thing, them being used against me is just a matter of time. Or, at least have in place strong protections by e.g. regulations?