I don't understand the thought process that leads to Calvin publishing (well, submitting to his editors for review and publication) King's quotes in a negative light when he has said similar. Wouldn't you just chalk those kind of posts up to "meh, I'd do that, nothing to see here"?
That said, if going looking to see if someone said something stupid on social media a decade ago is part of a "routine background check" then I think that speaks to something larger being wrong.