Should you judge a person by his/her face?

Yesterday, during my ‘free-time at work’ I was sitting with my new friends talking about relationships and stuff. So there was one girl who opened up about her relationship and showed us the pictures of her ‘true love’. As we were seeing the pictures, our sweet friend told us that she always wondered why everyone doubted her boyfriend’s character after having a glare at his picture. She wondered why everyone would just say that do not trust him, don’t indulge too much into this relationship, this relationship would destroy your life..that kind of stuff.
Now one girl, who was sitting with us also said (remembering her experience) that, “yes, he has that kind of a face; that when you give it a first look you don’t get good vibes!”
During this conversation, I was wondering that can one really judge a person by just looking at his/her face?
So I asked all of them that question. And to my surprise, most of them said yes that you can judge a person by just a picture. But I had some different views; to me you cannot just judge a person without talking to him/her. When you see a person’s photograph or someone new you meet, you make your own perceptions which play in your mind and you end up developing views about that person through your past experiences. Yes, physical appearance plays a very important role in starting a new conversation or breaking the ice but it does not mean that you can judge a person or make positive/negative views about it before knowing that person personally! To me it is more like that you yourself build perceptions and decide whether this is person is good or not and this way it plays as a barrier in your social development.
I also make perceptions by just looking at them but you have to aways give a shot to properly know that person and then come to a conclusion. This way, it helps you to be more positive and more interactive.
Well this little session ended with a laugh and she saying, “fuck you all, i love him with all my heart!”
So this was it and after crushing the coffee cups completely, during the chit-chat, we threw it into the dustbins and went back to our work.