For those who don't know, Xrumer is software which automatically tries to register with forums and blogs etc. to automatically post spam. It's probably the worst bot spammer and the bane of forum owners.
It was only Xenforo 1.4 which introduced protection against the likes of Xrumer in the core software and we had to employ an addon until then else our forums would be blitzed with spam.
Anyway I thought it was particularly cheeky that this had been posted, and presumably it was manually done. I hope.