We were 'blissfully ignorant''of' the problems that had occurred.
She was 'ignorant' about the dangers of the drug.
They were 'ignorant' [='unaware'] 'of' the facts.
(..) The Internet's not written in pencil, Mark, it's written in ink, and you published that Erica Albright was a bitch, right before you made some ignorant crack about my family's name, my bra size, and then rated women based on their hotness. ' Erica, is there a problem? ' No, there's no problem. (..)2010 The Social Network