[gtd]

I'm guessing simply because he could not verify that he was the account holder.

Of course there could be numerous curatorial reasons, but that first one would seem to be a deal-breaker regardless.

[loboman]

I asked if he could either remove my account or comments. He said that the comments are part of other people's conversations, so he didn't want to remove all of them (later he asked if I had some specific comments I wanted to remove, and what were my reasons to want to remove all of them). By then I realized he was right.