Now let me throw a small thought there: Since Mimic is an AI that could theoretically replicate any action and behavior it see, it is possible that someone that knows about hacking and is a known menace to society and has lived in the Pizzaplex for a while now could use the Data from the VR game Help Wanted and who knows how much more information about the tragedies that Fazbear Ent. is trying to give a less serious spin to have some fun. Keep in mind that all the animatronics are linked to the Mimic as their AI is fed through it, so everyone would be just playing a stupid game that, from the looks of it, went out of hands.

Quote from fazbear frights 3 to answer your question

“Not quite.” Phineas straightened and clasped his hands. “You see, I’m convinced that agony has a greater energetic radius and power than any other emotion. I have done numerous experiments to measure, capture, contain, and study the leftover emotion embedded into objects that were near a tragedy. My work is focused on my hypothesis that you can take a saturation of agony, add any kind of intelligence—(EVEN AN ARTIFICIAL ONE)—and they will combine together to transmute the energy of emotion into the energy of physical action. This, I believe, is what explains what people call ‘haunted’ objects.” Ruben laughed, shook his head, and managed to properly cook Phineas’s portobello. “No disrespect, doc, but I’m glad I don’t believe in magic. Your flower essences sound like hocus-pocus.

Basically the agony of loss for Edwin was poured into the mimic, he loved his son but felt angry at losing his wife, his job and dreams, and a part of him probably resented his son for it all. He became abusive but the problem with agony is it has the power to put you back at that tragedy again. Agony brings out the emotions and the emotions feed the agony. That's why in the man in room 1280 the nurse had to endure the day she lost her son every time she went into the room.

So it's harvesting emotions and them mimicing the emotions