Haha, well at least you fixed the 'not enough applications problem'! I would have submitted but I can't move this summer, although I think just getting feedback from yCombinator would be worth it to me. To bad time is your most precious commodity.
We do, in a sense: some people who apply we already know, because people we've funded recommended them. If you can impress the founders of a YC startup, that counts for a lot.
This site was designed partly as an additional filter. It works too. When I met danielha I knew his name because he was #1 on News.YC.
Of course, the best way to counter this is to go around downvoting Alex's comments that aren't particularly interesting or insightful. I wouldn't normally do something like this, but in order to make up for 74 (!) upvotes, it might be necessary.
One decent approach is to create two comments with instructions to vote one up and the other down, so you stay karma-neutral. So you need a total of 1+2n comments for a poll with n options. Like so: