YouTube on Thursday said it was banning content that targets an individual or a group using conspiracy theories such as QAnon or Pizzagate that have "been used to justify real-world violence."
The company said in a blog post that it would begin enforcing these expanded hate and harassment policies immediately and would "ramp up" in the weeks to come.
The move follows recent crackdowns announced by other major social media companies, including Facebook and Twitter, against QAnon content.
QAnon is an unfounded and sprawling conspiracy theory that baselessly claims U.S. President Donald Trump is secretly fighting a group of child-sex predators that includes prominent Democrats, Hollywood elites and 'deep state' allies. It was named by the FBI as a potential instigator of domestic terrorism.
The conspiracy theory also borrows some elements from the fake 'Pizzagate' theory about a pedophile ring run out of a Washington, D.C. pizzeria that led a North Carolina man to open fire in that establishment in December of 2016.