User blog comment:B214/Volume 23 discussion blog/@comment-76.175.162.45-20170404042611/@comment-31137559-20170404180447

It's not like it's exactly a secret. What do people think happened? That all the major powers of each faction went on a thousand-year vacation? And the barrier was specially made. Not just anyone can get into there.

And even if they told them, what could they possibly do? They probably do get info on what's going on inside that barrier.