The wider issue here that I don't see anyone really addressing is why are US Citizens interviewed/interrogated (even casually, at the CBP desk) about their activities.
I'm a British Citizen living in the US (so I'm mandated to fully answer all questions because I have no pre-governed right to entry into the US) but when I return home to UK they scan my passport and wave on me - no questions at all.
Regardless of this individual case, as a wider issue I don't understand why people (US Citizens) accept as policy and expected MO that CPB routinely asks the level of questioning that they do to citizens.
I'm a British Citizen living in the US (so I'm mandated to fully answer all questions because I have no pre-governed right to entry into the US) but when I return home to UK they scan my passport and wave on me - no questions at all.
Regardless of this individual case, as a wider issue I don't understand why people (US Citizens) accept as policy and expected MO that CPB routinely asks the level of questioning that they do to citizens.