Please - what's the absolute worst that can realistically happen? A slightly dull couple of hours followed by some kind of mutual excuse and another Facebook friend you don't really speak to. At best, you can have a hilarious night, or (as an outside chance) actually get off with your date. My last two blind dates were both great fun.
With regard to the scoring, I'd have thought it's a good thing - I wouldn't want to go with someone who is very much one of the beautiful people (unless I were one myself, which I'm not), as I would feel rather inadequate.