Wow. I just feel bad for World of Warcraft when I see things like this. Take DonnieDarko, for example. He has close to 300K HKs, but there's a major gap in his achievements. Most of them come from December 2009, which means just after the no-XP patch and achievements landed. There are a couple of achieves from 2010, then nothing until February 2011, including his first Eye of the Storm battle. That tells me Donnie basically farmed newbies before the no-XP patch hit, then left a couple of months afterward. Since there weren't EU 49 games last year, he was either a 39, 29, or (most likely) a 19. Then he returned early this year, leveled up, and started using the XP eliminator exploit to terrorize people in the 50-54 bracket. If he's having fun, well, more power to him I guess. But if he were to put his armory in a "rate my twink" thread, I don't think he'd get very far.
Hopefully I'm wrong, and he's just leveling through to get to a higher, active XP-off bracket. But the Dark Iron Rings say otherwise -- those are some of the hardest items to grind in all of WoW for XP-off, especially since he didn't level until this year, when the grind got much harder (coffer keys no longer stay in inventory). Unless he got amazingly lucky, we're talking a hundred BRD runs easy. I could easily see double or triple that number.
That's a dedicated XP-on griefer.