If you say so.
By the way, have you seen the video for "Rain" by Madonna? She has a few videos like that, but that one has a lot of consciously evil looks which anyone can see, and the lyrics could easily also be read as a metaphor for the "energy" or "light" of Lucifer coming down, getting you more ecstatic than any drug could (like many over-the-top love songs).
"I feel it, it's coming
Rain, feel it on my finger tips
Hear it on my window pane
Your love's coming down like
Rain, wash away my sorrow
Take away my pain
Your love's coming down like rain
Waiting is the hardest thing
(It's strange I feel like I've known you before)
I tell myself that if I believe in you
(And I want to understand you)
In the dream of you
(More and more)
With all my heart and all my soul
(When I'm with you)
That by sheer force of will
(I feel like a magical child)
I will raise you from the ground
(Everything strange)
And without a sound you'll appear
(Everything wild)
And surrender to me, to love"
For one thing, "Magical Child" is a well-known occult term taken from Aleister Crowley to describe someone conceived for black magic abilities. Still, it could all be my imagination, of course.
But as for the idea you can't recognise human qualities like "evil" just by looking at someone I have to strongly disagree. It's a basic survival-skill given to humans and animals to know when their at risk of being attacked or their life is in danger. All kinds of emotions, especially the ones we react strongest to, like love, happiness, and aggression, and especially when they're strong, can be recognised by the emotional energy emitted from their face, eyes, and whole body, and also the body-language.
Or can't you tell if you're being approached by a friendly or hostile animal? And if you're approached by an hostile animal do you just stand around waiting to see what's going to happen? Not unless you're retarded or lack the normal survival instincts. It would take you just a fraction of a second to work out you're in danger of getting attacked and need to run away, just by looking at their face and body-language. Especially as an attacking animal's aggressive energy is very powerful and unmistakable.
Humans are also a form of animal and not that much different that way, only more subtle, and unlike animals we have the abilty to be conscious of what we express and control it. Some are much better at it than others. Some are also better at perceiving it than others. It's mostly an unconscious skill, so a lot of the time someone won't understand why they feel alarmed but just act out on the impulse.
This is often misunderstood as a "psychic" ability when it's really more part of the animal instincts. Like children who don't understand how adults are able to consciously read their emotions or tell they're lying when they haven't developed that ability themselves yet. Also, how do you think new parents are able to tell how their child is feeling or what they need before they have learned to talk yet? They soon have to learn. It's the same principle.
Also, keep in mind most of our mind is subconscious but some have learned to access more of their subconscience than others. In the same way, the average person only uses 10% of their brain, but some have trained themselves to use more of it than others and we all have different parts we use better depending on what we've focused on.