Trolls.  Everyone has raged at them before, but few actually have seen one.  [Probably because they never leave their caves.]  The truth is, trolls can take on two forms.  Both are equally trolly, but they leave a different impression.

Here is the "Troll Face" that most people are familiar with:

The teeth, the mischievous look.  How very troll-like. HOWEVER.  I don't like to say this a proper troll face.  This is what a real troll looks like:
You know why he's successful?  Because he is way better than Mr. Troll Face up there. 

The troll face is a poser.  Like any good hipster, Mr. Green was a troll before trolling was cool.
This is the real identity of the "Troll Face."  Mr. Cool Face.  'Problem?' guy.  Not the Troll Man.  This face says "I'm a jerk, I'm gonna fuck up everything you love then laugh about it."  At the same time, The guy with the horns is all over here, playing pranks with the guys, then all laughing together about it.
That's right, the lovable troll.  So tell me, which side do you want to be on?