Wait, he's the bully?
Laura Ingram, with millions of Fox News viewers, sponsored by multinational companies, uses the platform she's been given to rally all her Twitter followers against Hogg with a petty personal attack, (which btw was pretty inaccurate, since he didn't really whine about not getting into any collage, and even said he's not surprised that he wasn't chosen because there are so many other brilliant people who don't get in either).

It's only fair that the investors of such shows are reminded if they really want to sponsor people who promote such behavior.
And at least 13 so far (last I heard) pulled their advertisement.

She's the bully here. And this is exactly how you stop bullying from someone in a much more powerful position than yourself.

The lad is basically rallying his followers to a perceived insult. Basically she commented on his college applications saying this.

 “Rejected By Four Colleges To Which He Applied and whines about it. (Dinged by UCLA with a 4.1 GPA...totally predictable given acceptance rates.)”

Hogg took this as a slight against him and went on to link Laura Ingrahams sponsors to his social media following in an attempt to cause a boycott. He got it alright, almost every company pulled out. Ingraham tweeted an apology.

Hogg did not accept. Further doubling down on his personal vendetta against her. These articles can sum the whole thing up better than I can. 

Hogg was criticized by Fox News personality Laura Ingraham who made a comment about Hogg being rejected by several colleges and then complaining about the rejections; in response, Hogg urged people to boycott Ingraham's advertisers.^[46][47] Within two days, fifteen companies had ceased advertising on her show.^[48] Ingraham apologized for her remarks,^[49][50] but Hogg rejected her apology, saying she had only apologized because firms had been boycotting her show, and he said that he would accept her apology in the future if she denounced the way that her network had been treating him and his friends.^[51] By March 31, 2018, Hogg was urging his followers on Twitter to boycott Arby's restaurants, which is continuing to advertise on Ingraham's show.^[52]

How scary is this is this outrage mob. This has absolutely nothing to do with the survivors of Parkland or any matter that he protests this is a personal vendetta against a perceived negative comment. 

In other news the NRA keeps profiting from donations, this kid and his outrage crowd. Near tripled donations and profit since the Parkland shooting. No matter what the media say, this is obviously because of the rhetoric by the outrage crowd, calling anyone who disagrees with them child killers and the media parading these kids around like puppets. I have to question why democrats and left politicians want guns to be taken from Americans so bad they will stoop to using kids to push their agenda. 

NRA donations triple in February, soaring after Parkland school shooting | Boston 25 News

Wait, he's the bully?
Laura Ingram, with millions of Fox News viewers, sponsored by multinational companies, uses the position she's been given to rally her followers against Hogg with a petty personal attack, (which btw was pretty inaccurate, since he didn't really whine about not getting into any collage other than saying "it was a bit annoying", but adding that he's "not surprised that he wasn't chosen because there are so many other brilliant people who don't get in either").

It's only fair that the investors of such shows are reminded if they really want to sponsor people who promote such behavior.
And at least 13 so far (last I heard) pulled their advertisement.

She's the bully here. She personally attacked him, unprovoked.
And this is exactly how you stop bullying from someone in a much more powerful position than yourself.
Hit them where it hurts. In this case, the wallet.

Bullying is attacking someone weaker than you, for no particular reason.
That's what she did. She's significantly more powerful than him both on both TV and Twitter based on followers.
She will be able to 'make a living' without those advertisers. But it's very fair to ask those advertisers if they want to be associated with her behavior. She is the one who alienated them. Hogg brought attention to her behavior to the advertisers.