Blocked, Denied, Entity and Debarred Persons Lists re Travelling - Do You Feel Safer?

Do you think this list works in stopping the bad guys? No one knows if they are on it until they show up and try to travel. Blocked, Denied, Entity and Debarred Persons Lists Below is a list of links to the Office of Foreign Assets Control’s Specially Designated Nationals and Blocked Persons list, the Bureau of Industry and Security’s Denied Parties List, the Entry List and the Office of Defense Trade Controls’ Debarred Persons Lists. http://www.cbp.gov/xp/cgov/export/persons_list/