When I was working on that, I had thought that 10,000 was a lot of HKs. Then I read that 100,000 is the final achievement, and it comes with a title, and suddenly 10,000 seemed like just a drop in the bucket!
Unfortunately the title you get is meh. "of the Horde". For 100K HKs, it should be something exciting! Something with more character! "Mass murderer", "PHD in genocideology", or my favorite idea: "WMD" -- Weapon of mass destruction! The description of the achievement could be something like "Well of course no one could find you, you were in Azeroth all this time!".
Anyway, in non-murderous news, I may die of lack of sleep! zzzzz So tired. Again I stayed up too late last night (EEEEE outstanding and eeee and RP so good it made me wiggle in my seat!), and I woke up three hours before my damned alarm went off and couldn't go back to sleep, so I got less than two hours of sleep last night, and not much more each of the last five nights. Gah! (But still: Eeee RP!)