Facebook is facing a legal battle over allegations it times the length of toilet breaks taken by employees who are monitoring illegal, offensive or pornographic content.
It is claimed that employees must log in and log out every time they leave their desks, even when going to the toilet.
If senior managers believe that the length of the break is too long, the employee must provide an explanation.
According to Valera Zaicev, who started working as a moderator with Facebook in the Dublin office in July 2016, initially it was a good job with plenty of support and training.
However, he said over the course of two years, the number of moderators working in Dublin increased from 120 to 800, with far less training for the newer intake.
He told Vice News that in 2018, the company introduced a 'new time management system' which monitors the moderators throughout the working day.
He said: 'People have to clock in and clock out even when going to the toilet.'
The moderators are responsible for determining whether posts on the social network breach the company's terms and conditions.
This includes attempts to share images of child sexual abuse, bestiality and extreme violence.
Chris Gray who spent 11 months working for the firm said he developed PTSD because of the stress of the role.
He said: 'You're allowed four or five mistakes a month — a 2 per cent failure rate, 98 per cent quality score. So if you come in, and it's Tuesday or Wednesday, and you've got five mistakes, you are f***** for the month, and all you can think about is how to get the point back.'
When logging on at the beginning of a shift, the moderators are told the type of images they were supposed to assess.
Both Zaicev and Grey are in the process of taking legal action in the High Court in Dublin.
A Facebook spokesperson told MailOnline: 'The wellbeing of those that review content for Facebook is and will remain our top priority and we invest in the resources to ensure they have the training, coaching and guidance necessary to successfully review content.
'Content reviewers are not required to evaluate any set number of posts, do not have quotas, and aren’t pressured to make hasty decisions - but we do believe that efficiency and effectiveness are important factors both in terms of the trust people have in our platforms and our ability to keep them safe.
'Neither Facebook nor our partners specifically track restroom breaks. The system they have in place is to help plan staffing schedules and ensure reviewers have time for well-being breaks and training.'