You know things are messed up when a Big Tech company fights accusations of union-busting by insisting it was only AI layoffs. That’s where things stand after a group of fired TikTok moderators in the UK filed a legal claim with an employment tribunal. The Guardian reported on Friday that around 400 TikTok content moderators who were unionizing were laid off before Christmas.

The workers were sacked a week before a vote was scheduled to establish a collective bargaining unit. The moderators said they wanted better protection against the personal toll of processing traumatic content at a high speed. They accused TikTok of unfair dismissal and violating UK trade union laws.

“Content moderators have the most dangerous job on the internet,” John Chadfield, the national officer for tech workers at the Communication Workers Union (CWU), said in a statement to The Guardian. “They are exposed to the child sex abuse material, executions, war and drug use. Their job is to make sure this content doesn’t reach TikTok’s 30 million monthly users. It is high pressure and low paid. They wanted input into their workflows and more say over how they kept the platform safe. They said they were being asked to do too much with too few resources.”

TikTok denied that the firings were union-busting, calling the accusations “baseless.” Instead, the company claimed the layoffs were part of a restructuring plan amid its adoption of AI for content moderation. The company said 91 percent of transgressive content is now removed automatically.

The company first announced a restructuring exercise in August, just as hundreds of moderators in TikTok’s London offices were organizing for union recognition. At the time, John Chadfield, CWU’s National Officer for Tech, said the workers had long been “sounding the alarm over the real-world costs of cutting human moderation teams in favour of hastily developed, immature AI alternatives.”

“That TikTok management have announced these cuts just as the company’s workers are about to vote on having their union recognised stinks of union-busting and putting corporate greed over the safety of workers and the public,” Chadfield said.