Originally Posted by
BigFlyer
As has been written about here repeatedly, returning US citizens routinely get asked intrusive questions (with the least intrusive being how long have you been gone, where have you been?) at US passport control.
I have never been ask anything upon returning to the USA except have I been on a farm - that was back when hoof and mouth disease was an issue. In fact, with the passport express (not Global Entry) there are no questions.
So while it does get reported where citizens are questioned the overall number are probably very small compared to those who do not.