Yes, inverse profiling works this way. A group with known individuals communicates constantly with someone who ain't using FB or Insta. You still know this pers

Yes, inverse profiling works this way. A group with known individuals communicates constantly with someone who ain't using FB or Insta. You still know this person quite well, easily identifiable, maybe lacking some information but more than needed. This is also why privacy has been a game over for decades. Ten years ago or so, friends boasted that they don't use Gmail due to privacy concerns but happily email folks with Gmail accounts. One group picture is sufficient, you can work from there.