[andreasvc]

One plausible scenario for the IP address is that he had comments from his friend on his blog, and then baited the troll to also comment there. The IP addresses would then be identical, providing the identification. Dynamic IP addresses would pose a problem, but most broadband has (semi-)fixed addresses, and even dynamic addresses would come from the same range so could be enough to trigger a hunch.

Rather than embellished, I'd more easily suspect the story of being selective. I just can't imagine someone not expressing anger when confronted with someone who harassed you.