Eugene Volokh's been standing up for truth which, in this odd case, means standing up for Cynthia McKinney's reputation.
It's generally been the case that the internet has worsened the old "falsehood around the world/ truth putting on its boots" thing. By the time a correction had been made, the lie, rumor, or urban legend had been forwarded from e-mail to e-mail hundreds of thousands of times. Bloggers, at least sometimes, can give the truth a serious acceleration boost. For all that blogging seems like amateur pundits commenting on professional reporters, one of the most valuable services we provide is simple but public fact-checking.