That's the idea of hellbanning.
http://en.wikipedia.org/wiki/Hellbanning
tldr; unwanted users can't contribute, feel excluded or ignored, then go away.
Re:Ask PG: Why is everybody hellbanned?
by chockablock on Sunday August 04, 2013 @12:48PM
(#6156114)
I think it's to limit the damage you can do: someone who knows their links are DOA would be more likely to create a new account.
Instead, you get no warning, so you believe your submissions have been accepted, when in fact nobody else can see them. If you click the "New" link you actually see your own submissions, but since nobody else can, they never get any votes.
This is quite deceptive and probably done to keep you interested in the site, until you figure out you have less "rights" than other visitors.