I actually see the opposite. For example, I see that when people come from countries such as the U.S. or Portugal, and there are no controls on when they leave, a lot of times there's more of a sense that it doesn't really matter since it was so easy for them to come in. People who required visas to come in know it is difficult to come in, and there is a sense that they must maintain their status. Often they're much more concerned about maintaining their status than are people from countries from which visas are not required.
On June 6th, 2013. See this statement in context.