I disagree with this in the strongest terms.
I realize that the people on this site lean right, and arguing politics isn't really cricket, so I won't go into to why.
The "center" is a political ideology that pretends that it's something else.
Also, being good at one thing doesn't make someone's opinion about everything else important.
> Accidental moderates end up in the middle, on average, because they make up their own minds about each question, and the far right and far left are roughly equally wrong.
I disagree as well, but it could be revised to:
> and the [accidental moderate believes that] far right and far left are roughly equally wrong.
This would make the definition somewhat more sensible, though I'd still disagree with it.
I wasn't able to turn up demographics for the site, so I can't outright disagree with you on the political leanings of HN, but I'm curious to know what they are.