its good to know this type of thing. every passenger flight manifest is accessible by x number of federal agencies. greyhound bus schedules too. i imagine many people have been on the run and booked a greyhound bus ride and got busted due to a simple nationwide computer flag. probably the minute they bought the ticket it sent an alert. you used to be able to buy bus tickets without id but that changed a while ago. so once you buy the ticket your name is checked against x number of databases.  i was on a bus once that pulled over along a highway, and a state trooper came on and found the guy he was looking for and took him off the bus
United States