I had a bad road crash that I posted elsewhere a while back. My front tire clipped my friend's rear one. Anyway I had road rash on my upper thigh on the side. Didn't phase my PI tights I was wearing--no scarring. My glasses broke and cut my forehead to the tune of about 15 stitches--slight scarring there, but you really have to look to see it. I spent 2 days in ICU because my brain bled in 7 places. I don't think there's any scarring there--I feel normal and people don't seem to look at me sideways or anything. Hurrah for my helmet!

I also went down on some railroad tracks one time (I now walk them) and have a slight scar on one knee--badge of honor!

Don't be scared--everything in life involves risk. The rewards of cycling are worth the risks.