You are missing the point. Remember, Polarik does NOT say the halo is the sign of forgery. I specifically asked him that.
He says there are missing green pixels between the letters, between the halos, and that these missing green pixels prove forgery.
What I did was select the letters and the halo, but NOT the space between them, and paste them onto an otherwise clear part of the background. From that I got an image with green pixels in the same places, and missing from the same places, that Polarik says were forged. It disproves his contention that there were missing green pixels. The green pixels look just like they should look.
I say that haloing is the best clue that a layman has that something has been done to Obama's CoLB because it does not occur naturally and even you yourself have proved that theory correct for me by showing us all how such haloing can happen using photoshop!
Weather you like it or not the haloing is not a natural occurrence and only you have proved that it can be a direct result of photoshopping.