TikTok users are trolling Trump’s upcoming Tulsa rally attempt by registering for tickets they don’t plan to use.

Donald Trump says almost one million people have requested tickets to attend the free event in Tulsa, Oklahoma. The auditorium where the rally will be held has 20,000 seats. TikTok users say they’re registering to take tickets and create an empty event by flooding the system.

“All of those of us that want to see this auditorium barely filled or completely empty go reserve tickets now and leave him standing alone there on the stage,” a TikTok user told her 1,000 followers. A former Pete Buttigieg staffer is leading the charge on TikTok.

She says the move came as a response to Trump hosting the rally in Tulsa on Juneteenth, a holiday commemorating the end of slavery in the United States. Tulsa is also one of the sites of the worst racial violence in United States history.

TikTok users are also asking K-pop fans to join their crusade. K-pop fans are a well-known force on social media. After BTS announced a $1 million donation to #BLM activists, the BTS Army matched it 24 hours later. K-pop fans also took over the #WhiteLivesMatter hashtag to drown out racist comments on Twitter and Instagram.

The backlash Trump’s campaign received for hosting the rally on June 19th eventually forced them to push it to June 20th. Many people are also concerned about the spread of coronavirus from massive public events like political rallies.

Organizers of the Tulsa rally have asked attendees to sign a waiver saying that they won’t sue the campaign if they get COVID-19. Oklahoma itself is still in the early stages of re-opening, with social distancing guidelines in place.

As for leaving the seats empty, Trump’s campaign believes the stunt will backfire. “They think if they sign up for tickets that will leave empty seats. Not the case at all. Always way more ticket requests than seats available at a rally. All they are doing is giving us access to their contact information,” a campaign staffer told CNN.