[1] The size and contents of the list fluctuates and is a secret, although the Transportation Security Administration has stated there are tens of thousands of names on it.
[2] The Selectee list has been cited by civil liberties groups to be infringing on privacy rights and potential for racial and ethnic discrimination.
[3] Passengers who have been selected for secondary screening will have the letters SSSS or *S* (all capitals) printed on their boarding passes as a signal for the need for a thorough search at security checkpoints.
[4] In the case of Southwest Airlines, secondary screening selectees may have a "checkerboard" pattern printed on their boarding passes.
[10][11] Critics of the George W. Bush administration, including Sen. Edward Kennedy, Rep. John Lewis, feminist Naomi Wolf, peace activists Father John Dear and Sister Virgine Lawinger, Center for Constitutional Rights lawyers Barbara Olshansky and Nancy Chang, and Green Party activists Nancy Oden and Doug Stuber have been pulled aside for enhanced screening, leading activists to believe that some selectees were being harassed for speaking out against government policies.