Well honestly, if I say no, then I am lying :)
I think we all understand very well that we shouldnt judge a book by it's cover, and MOST of the time, I am willing to believe we don't do that. But, here I am talking about us doing it subconsciously :P
To guys out there, do you remember when was the last you saw a pretty lady and you thought that she would make a very good girlfriend / partner and you started head over heels in love with her?
That's an act of "judging people by their appearance", isn't it?
hehe...