Okay, this takes up too much text for a submit. So I’m gonna just write it out here.
So somebody lightened up the screenshots of the pizzaria, what we found was this.
That is not an animatronic fully clothed, that is an endoskeleton hanging out in the bathroom. So not only are our furry friends running around, so is this. But wait a minute… What did the guy on the radio say to us on our first night?
Uh, now concerning your safety: the only real risk to you as a night watchman here, if any, is the fact that these characters, uh, if they happen to see you after hours, probably won’t recognize you as a person. They’ll - They’ll most likely see you as a metal endoskeleton without its costume on. Now, since that’s against the rules here at Freddy Fazbear’s Pizza they’ll probably try to uh… forcefully stuff you inside a Freddy Fazbear suit.
So here’s the idea. The popular idea is that the bite of ‘87 was caused by Foxy, and that’ totally plausible. But here’s what I’m thinking. The bite was caused by this character. Maybe it was a side-character for Foxy to banter off of during his performance, maybe he was another Freddy for that specific stage. But this guy fucked up. So to save on money, the staff decided to just strip him of his costume and just shoved him in the character room.
But he doesn’t want to stay there forever. Maybe he’s afraid of being dismantled. So during the night, he tries to get out, wander about, and maybe wants to do his job again.
Maybe he sees you as a possible scapegoat.
What does the player see when they have a game over?
Food for thought…
This also explains why Foxy moves so quickly and darts directly for the nightwatch room. He wants to get back at the screw-up who put his stage out of order.
TL;DR - Headcannon: The Freddy Fazzbear characters really are looking for a team member that is breaking the rules overnight. If they catch you, they confuse you for the naked animatronic and you suffer for his deeds.