Parkland shooting survivor and pro-gun control activist David Hogg is now leading a boycott campaign against Fox News host Laura Ingraham after she knocked him for complaining about colleges that rejected his applications. “David Hogg Rejected By Four Colleges To Which He Applied and whines about it,” Ingraham wrote on Twitter Wednesday morning, linking a Daily Wire article. Her parenthetical: “Dinged by UCLA with a 4.1 GPA…totally predictable given acceptance rates.” Ingraham’s tweet sparked a backlash in the media. Hogg responded by targeting Ingraham’s advertisers. Hogg tweeted out a list of Ingraham’s 12 biggest advertisers and called on his followers...