Maybe Celebrimbor is not really Celebrimbor, but really Sauron in disguise, underhandedly culling the weak links in his own ranks using a Ranger who... Oh never mind. It's probably unsalvageable.
And an Elf ghost... yeah... that's kind of iffy. Maybe if he was evil enough to share fate with the corrupt dead, but throughout the Silmarillion, there are plenty of examples of arguably evil elves who still ended up in the halls of Mandos. Was Celebrimbor corrupt enough to even warrant this discussion?
I'm a bit of a stickler for canon in Tolkien's work, but primarily because I believe it honors his memory and lifelong effort by adhering to his intentions. There is plenty of room to play around in his world without stepping on toes, so I don't get why some people feel the need to intrude. What I'd like to see is some serious works which tackle the far east and south lands, maybe even the blue wizards. And of course the story doesn't end with The Return of the King. It's actually more of a beginning.
In the meantime, somebody get Peter Jackson a pacifier and don't let him play with other people's toys anymore. He likes to break things.