It means that if you add someone to your ignore list you will not get spawned into an instance with them. 30 ships doing a "blockade"? no problem just add them all to ignore and the blockade effectively goes away.
Oh really? You can bury your head all you like, a majority of group players usually keep a long list of friends.
If your block list gets big enough its not everyone else who becomes lonely......
If you don't want to play others why are you here, is Open not for public, it should cater to you?