Sure, he doesn't directly acknowledge it, but it's pretty obvious when he alters or deletes writings I show to be plagiaristic and such.
Since I rumbled him in "Manchester vs. Google", his blog entry concerning Barack Obama has mysteriously disappeared:
A shame, indeed, as I reported his plagiarism to Jean M. Heimann, author of one of the sources he stole a chunk of his "reply" from. I linked her to "Manchester vs. Google", so she could see for herself.
She might not get to see his post now, but I had enough foresight to save it.
A word to the wise, in dealing with the various online incarnations of the Highgate Vampire: make sure you save the pages you cite!