There are some innovative things going on with librarians also, who are restricted from reporting to their superiors or to the subject him/herself if the FBI comes researching their habits. Things like putting lists on the door of "agencies that have visited this library today" and crossing off any that have indeed visited. The FBI is of course on this list. Another gimmick had to do with "if this sign disappears, the FBI has been here today," kind of a reversal of the other one.

I probably read it here, but it might have been on something sent around at the library where I work.

SRS