B"H.
Considering that vegans think that humans are animals, and vegans are against deriving benefit from animals, especially those who are abused who didn't agree to work for whoever is benefitting from them, then would a vegan be careful not to eat any food or use any products that are made through human slavery?
(For example some factories in China, and even products made in USA prisons where the workers don't have a choice to work or not)?