some people call him that, yes
Call Dean and Sam.
There is no such thing as a good demon. They lost the capacity for 'good' billions of years ago when God kicked them out of Heaven.
It depends on what demon you try to call; The demons that hate humans will refuse to listen to a human even if they call the demon; The demons that don't/sort of hate humans will usually come but they will feel scared maybe since they don't understand, or like humans.
Toby
"Demon hunters" really do not exist. They were made up for a good story.
No Criss is not demon possessed. He is a really good goth magician.
in the Japanese episodes they call it the Kyuubi
The Sword you used to kill the demon with, the sword is good against demons.
scar
They don"t call it a screamin" Demon for nothing!
Infernal Devotees-The name suggests a strong allegiance to a demonic entity, emphasizing devotion and worship to the demon.