So you wanna counterpost me? Alright then
Ok, yes there might nit have been a reason we know of, but animatronics are animatronics and can malfunction or be influenced by a force greater than them
Contrary to popular belief, Toy Bonnie did not cause the Bite of '87. It was Mangle. Why would Toy Bonnie even want to tear out someone's frontal lobe? Mangle actually has a reason. She was a break-apart-and-put-back-together attraction. She hated Kids' Cove. She despised the nightguard. That's why she bit out the nightguard's frontal lobe. Venting her rage. FNaF