“Coming from a 14-year-old, please grow up,” Hogg’s sister tweeted.

David Hogg is one of the most visible teenagers who survived the Parkland school shooting and helped organize the March for Our Lives. He’s also a target of conspiracy theories and vitriol from some far-right figures.

David Hogg

Joe Raedle / Getty Images

David Hogg

On Wednesday, Fox News host Laura Ingraham mocked Hogg on Twitter about the fact he was not accepted to some of the colleges he applied to.

Fox News

Ingraham claimed Hogg “whined” about his college rejections and tweeted out a Daily Wire story about his comments.

In response, Hogg’s 14-year-old sister, Lauren, who also lost friends in the shooting, tweeted at the anchor to “grow up.”

Other student organizers also came to Hogg’s defense.

So did far-right figure Mike Cernovich, who said Ingraham’s approach was “not a good look.”

Hogg then jumped into the fray by calling for a boycott of Ingraham’s top advertisers.