Who are the people that aren't already using gmail/facebook/apple to ask their friend group this question in the first place? Regardless, it's pretty easy to i

Who are the people that aren't already using gmail/facebook/apple to ask their friend group this question in the first place? Regardless, it's pretty easy to infer from the person's Google searches what their friends told them. And if that user has an Android phone Google also has their location data to cross-reference with it, plus data gleaned from CC purchases and probably lots of other sources I haven't yet read about.