@talanhorne sir...
I'm really like ur this idea..
"Smile, You're being Judged"...
Don't think it's possible.
I mean, it is possible, but you can never rely on it.
I've been trying to 'read' people by their body language and by the subtext of what they say since i was very young, even got a few books to learn it better. Its usually working, but sometimes not. However, you can always try to do this for yourself but never really change your attitude towards somebody because of it. You might be wrong and trust someone who looks innocent that can hurt you by the end, or behave badly or just ignore someone who really cares and just want the best for you.
People are always telling me after they know me for some time that at first they thought im a scary person. Which is.. lol. So yeah... :)
Wel done sir...