I dont see anyhting wrong with them. I dont find them sexy, but i dont find them unappealing.
I remember I used to date a girl that had a scar that ran from right above her right eye, ran down her face and split, going over her eye with one line and the other going around, then joining half way down her cheek before ending on her chin. She was super nice and really attractive besides the scar (not that i minded, she had a good personality), but she said she got it when she had been laying down int he grass her and father ran over her face with a weed-wacker (-eater). He was an abusive drunk, so it honestly didnt surprise me.
We're still friends, but we broke up, though not over her scar. She just moved away.
So, OT: No I dont have a fetish for them, but I dont think tehy detract from a girl's beauty if she has a good personality. I feel the same way and burns and the scars they leave behind.