They could've always gone with an abbreviation. Roimuot isn't the worst name for something I've ever heard. Where I come from the demon realm is the Abyss and they sort of spill over into the hells now and then. But neither place is very pleasant at all. And neither cares much for humans.
For what little it's worth, I think if our evil emperor here - for lack of anything better to call whatever's in charge of this place - wanted us dead, then we all would be. But it certainly doesn't pretend it's keeping anyone safe.