Remember Operation Pipeline from the '90's and the DEA's ridiculous list of what cops should look for when making traffic stops? On the list were things like "fast food wrappers" in the vehicle, too much luggage, not enough luggage. (Law review article on it here, on p. 748.) It was a blueprint resulting in racial profiling.

Now the FBI has come up with a list of what ordinary citizens should look for and report when patronizing an internet cafe. It's called Communities Against Terrorism: Potential Indicators of Terrorist Activities Related to Internet Cafe. Among the suspicious indicators:

• attempts to shield the screen from view of
  others
• Always pay cash
• Signs onto Comcast, AOL or another residential-based internet provider

It's not just internet cafes. The FBI has distributed flyers for 25 types of businesses. You can view them all here.