Sorry, but this sounds about as reliable to us as the old drug pretext stops--cops would actually go into court and say they stopped a vehicle for a traffic offense but when they saw that the occupants of the car had fast food wrappings in the vehicle, they got suspicious because they knew that drug dealers ate at McDonalds, so they asked for permission to search and lo and behold they got it and found 50 kilos of coke in the car.

Today, instead of drug dealers, they're looking for terrorists--and they want cops to alert on people carrying almanacs:

The FBI is warning police nationwide to be alert for people carrying almanacs, cautioning that the popular reference books covering everything from abbreviations to weather trends could be used for terrorist planning.

In a bulletin sent Christmas Eve to about 18,000 police organizations, the FBI said terrorists may use almanacs "to assist with target selection and pre-operational planning." It urged officers to watch during searches, traffic stops and other investigations for anyone carrying almanacs, especially if the books are annotated in suspicious ways.

If we're stopped for a traffic offense with an almanac in plain view and asked for permission to search the car, the only words we're saying are "Officer, Am I free to leave?"