Sipa via AP Images Laura Ingraham speaks at the 2018 Conservative Political Action Conference L ast Wednesday morning, Laura Ingraham, Fox News’s queen of snark, tweeted that David Hogg—a 17-year-old who survived the mass shooting in Parkland, Florida, and has been among the eloquent advocates for gun control—“whines about” being rejected by four universities he applied to. She linked to an article from the Daily Wire calling him a “gun rights provocateur.” For Ingraham and Fox News, such cruel, ad-hominem attacks are typical. Vitriol helps boost ratings. After all, Fox is a central part of Donald Trump’s America. And Trump, like Fox News, has made bullying and humiliating people into an art form. But television viewers are also consumers, and the ultimate goal of advertisers isn’t getting them to watch a particular television show. It’s getting them to buy the advertiser’s products. Which has caused a problem for Ingraham. Shortly after Ingraham’s attack on Hogg, he called for...