By Chris Vallance
Technology reporter
Readers may find material in this article disturbing.
Behind the scenes on Facebook, thousands of moderators protect users from graphic content by filtering out posts that break its rules. The BBC has spoken to one moderator based in Kenya, who is taking legal action against its parent company Meta.
On his first day of work screening posts, South African Trevin Brownie watched a man take his own life.
"The problem was not [the taking of his own life]. The problem was the three-year-old boy that was in the video with this guy. So the boy was playing on the floor with these toys, like not even understanding what's happening".
It took two or three minutes for the child to realise something was wrong and to call out for his dad. He then started crying. Eventually an adult entered the room, and the recording was stopped.
"I felt sick. I, you know, I was vomiting because I didn't understand why people would even do things like that," Mr Brownie said.
In the course of his work, Mr Brownie would see the worst of humanity - from child abuse to torture and suicide bombings.
His experience, he believes, deadened his feelings. The tremor in his voice and his sympathy suggests he still cares deeply about others, but Mr Brownie believes part of his humanity is gone.
"Because I'm basically so much used to death and seeing death. It became a norm for me," he says. Deaths no longer affect him as he feels they should.
Mr Brownie sees those who work in...
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