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Looks like they grabbed all one and two character names, plus a little over 600 others: http://pastebin.com/gnLGmvXu

It would have been nice if they're reserved names for namecoin devs, it looks like someone grabbed u/khal who is not khal.

Oh how do you know it's not the real khal?

The bitcoin address in the profile is also used by u/speedcore and he always uses vanity addresses.

/u/britneyspears is my favorite.