In the closed session, reduction of certain phrases will be presented as a "win" against the terrorsm because only real terrirsts would be searching for banned concepts, rights? Since there are less searches, there is less work for a three letter agencies. So
That is not the problem. Problems will start when people with one half of the brain will know that they are being monitored, but, at the same time, with other part of the brain will genuinely think that they are free.
So there is a difference between citizens versus other people? Except that the Constitution has never separated "We the People" into citizens and non-citizens. In fact slaves were considered as the ones who did not have a voting rights back then. I would say that to be completely fair, US should be much more careful about the rights of those who do not have US citizenship because those people, non-US citizens are much more vulnerable, and much less represented and protected than US citizens.
P0RN is will always be a good niche for certain type of clientele. Leaves no electronic trace also, does not require electricity and information in such type of magazines will rarely result in additional search in internets.
To do nothing is to be nothing.