Kuwait and GCC countries regularly enforce such bans to flush out illegals..in local language its called "Operation clean up".
Brother You are educated person please act like one don't defend A=R.A.T.s at all cost to your intelligence
The blacklist includes trade, tourism
Here is some thing in today's BBC.
The pervasive influence of those last two problems was brought home to me by a great story I was told over dinner one night, which may or may not be apocryphal.
A Saudi princess asked if she could see a large house that had been built by a local businessman, with a view to either renting or buying it.
Flattered, he of course showed her round. But instead of paying any money, she simply took the keys and moved in.
All attempts to remove her failed.
So the man transferred ownership of the house to an American woman he knew, who promptly called the US embassy and told them that her property was being occupied, effectively by a squatter.
The princess left shortly afterwards. Master called and the poodle left
BBC News - Saudi Arabia shuns thought of Arab Spring
There were hundreds of them, migrant workers, from South and East Asia, coming to Saudi Arabia to work for meager, but tax-free, wages.
And their arrival in Riyadh coincided with my flight, making for a teeming but fairly orderly passport hall.
The queues were not moving much, however, and so one tall, thin Indian man decided to sit on the floor.
Not for long though.
Out of nowhere, one of the guards shoved his way into the line - spraying people left and right - and hauled the man back on to his feet.
Moments later, the same guard kicked the arm of another migrant worker who could not figure out how to operate the biometric scanning machine.
All this had taken place within 20 minutes of me setting foot on Saudi soil.
It was my first impression of the country - and to the extent that the incidents highlight the authoritarian, uncompromising nature of Saudi society, not to mention the appalling manner in which some low-skilled migrant workers are treated, then it has proven fairly accurate.
BBC News - Saudi Arabia shuns thought of Arab Spring