There's some of that in my world, though from what I've read, our demons are much different than the fire-and-brimstone pure evil sorts.

...Most of their ideas of evil usually involve simple, petty things. Usually pranks, being lazy and dumping work on others, stealing things, and proving superiority in battle. And of course... very few of them are truly, unrepentantly evil. And there are some who are genuinely good.