23andMe, for example, only shows your information to people that it identifies as being related to you (typically ~1000 people). And that's only if you have ope

23andMe, for example, only shows your information to people that it identifies as being related to you (typically ~1000 people). And that's only if you have open sharing turned on -- otherwise they need to send you a request. That's quite different from just sharing your information with anyone who searches for it.