A new flyer released by the Department of Justice and the FBI, emblazoned with the logos of each agency and being circulated to Internet cafes and other businesses, warns of “potential indicators of terrorist activities.”

In particular, the flyer cautions businesses to be on the lookout for “content of extreme/radical nature” as well as people who visit an Internet cafe even though there is evidence they have Internet access at home. It also urges people to watch for anyone using “anonymizers, portals, or other means to shield IP address,” or who seems “overly concerned about privacy.”

What’s more, the flyer urges people to be suspicious of those who “always pay cash” and to “identify license plates, vehicle description, names used, languages spoken, ethnicity, etc.”

The flyer concedes near the bottom that “some of the activities, taken individually, could be innocent and must be examined by law enforcement professionals.” Presumably, paying cash isn’t 100% proof that someone is a terrorist, but you’d better note their license plate and ethnicity, just in case.