Ghosts/Veil

[alora67]

No: HPFGUIDX 144920

I have been mulling over and over this.  The ghosts at Hogwarts are 
there for some reason, but it escapes me as as to WHY. What is their 
purpose, really?  I'm wondering:  do they report back to someone?  
such as the founders?  Can they communicate with those behind the 
veil?  Can they possibly go behind the veil and talk to them? They 
can't just be throwaways.  I do remember that NHN said that he never 
crossed over, but what if he can communicate with those behind the 
veil somehow?

Alora