To answer your question about the ghost spot, it has nothing to do with multi's, it is about stopping illegal drafting. By having a ghost spot, when the galaxy is basically full and you random in, say there is one spot open there are 6 possible families you could end up in. If there weren't ghost spots and family A wanted you then they would wait until the galaxy was full, kill someone, and illegally draft you in.
As for the second point with multi's, we attempt to link them back to a main account but aren't always succesful. There is a lot of investigation involved in proving that someone is multi-ing, and that the main account is the holder of the linked multi's. Where we can, we definately want to take action.
I don't like the idea of a forum posting the list of names of persons multi-ing purely because some of them are never lniked back to a main account, and in that circumstance how many names are we going to chuck in there that are meaningless?