I'd rather have a submission rewritten or denied than have horribly biased or even misleading summaries crop up on the main page.
This. My number one complaint about slashdot is all the misleading headlines and summaries.
I'm not to worried about biased summaries as much, to an extent... after all we're a tech/nerd crowd and if we released certain high-rated-insightful comments out into the general public many (most?) of them would be perceived as "very biased" as well.