It's unclear what specific story may have set her off, a report recently circulated where a source claimed that the supermodel wanted to meet boyfriend Zayn Malik's ex-fiancee, Perrie Edwards.
"Exactly what qualifications does one need to be a 'source'?! The amount of BS online, & how much negativity it creates, is truly sad," Hadid wrote. "Not just for the people being spoken about, but how you treat each other online sometimes makes me sad."
"Honestly, I felt I was in danger, and I had every right to react the way I did," she wrote in the latest issue of Lena Dunham's Lenny Letter. "If anything, I want girls to see the video and know that they have the right to fight back, too, if put in a similar situation."
Hadid reacted quickly after a man wrapped his arms around her waist and lifted her into the air -- elbowing him in the face and running after him.
"Practicing self-defense is important so that when you're in the moment, reacting from muscle memory comes more naturally to you than freezing up," she added. "Confidence in your own ability to defend yourself comes with educating yourself about it, and is a massive advantage when in an unsafe situation."