Discuss this as you want, flame me as you want, but the evidence is simple.
Whoever the phantom slasher is, if it's not Rhue, it's been following Rhue around, and there're quite a few victims shown that show it might very well BE Rhue.
Now, what I personally find interesting is, who says the phantom slasher we know and the one everyone in the game knows are the same being? I mean, he only spares children right, so who saw him do the crime? He seems too elite of a murderer to, well, leave witnesses, unless he specifically spares them.
And who says the children were telling the truth?
Here's one theory on how that could be possible, without it simply just being true:
What if the phantom slasher we know is an embodiment of crimes done and blamed on by a mysterious "phantom slasher" in the game?
Or in fact, what if the phantom slasher we know just isn't the same being at all, and we're all thinking he or she is simply because it seems to be that way? What if it's just someone stalking and protecting Rhue? Perhaps even Serena, who's JUST as obsessed over Rhue as he is over her, but in a different way?
If this has already been written, my appologies. To aid you in flaming, here're the concepts I just wrote:
The Phantom Slasher not being the same being as the infamous serial killer known in the game.
The Phantom Slasher we see being Serena and not the actual Phantom Slasher at all.
The Phantom Slasher we see being an embodiment of murder.
And the infamous serial killer dubbed the "Phantom Slasher" being more then one individual.
[Edit] I forgot:
Why Gaius thinks Rhue is the phantom slasher. [/Edit]
Also, mind pointing out what topics touched these possibilities? URLs please.