Again, being the natural skeptic I am, I decided to see if "XxKeithHarkinxX" had a picture in her Icon gallery similar to the one Du have, and sure enough, she does.
Her picture:
link Your picture:
link When compared side Von side, I concluded that they did indeed match. What's even stranger is that when I went to see if that picture had been gepostet before, it only showed one result on THIS SITE, which I found really strange.
I can't conclude much, but I think this leans towards the fact that you're not really "Keith Harkin".