From an interview with Vulture:

You made it clear when you talked to Willa Paskin earlier this year that you're not a fan of folks who call Scandal a "guilty pleasure." Why do some folks still insist on that phrase?
It's because I write Grey's Anatomy, because I write things people think are a little fluffier in their mind. Which is weird, because Grey's Anatomy is pretty dark. It's the same reason that when people call it a soap opera I get pissed -- because it's not a soap opera. And I don't think it's a guilty pleasure. It just sounds like a back-handed compliment. If you think it's a guilty pleasure, don't watch it. The Real Housewives of any city is a "guilty pleasure."