Corrected entry: Spider-Man should've recognized Black Cat as Felicia Hardy since she doesn't disguise her voice.
Sins of the Fathers Chapter 12: The Spot - S3-E10
Corrected entry: In this episode, Kingpin states that despite his appearance, he only has 2% body fat. There is no way a person with only 2% body fat would appear to be morbidly obese (not being toned isn't the same thing). Abdominal muscles start to show at around 9%. Kingpin is a normal person with no super powers, so no special science fiction exceptions can be made for him.
Correction: And Cartman in South Park always says he's not fat, just big boned. It's simply a lie Kingpin tells people. Perhaps the last physician who told him his actual body fat percentage met with an untimely demise so the next person told him what he wanted to hear, that he has 2% body fat.
Correction: This is a common trope in superhero stories and falls under suspension of disbelief. Spider-Man doesn't disguise his voice either, but no-one he also knows as Peter Parker recognizes it's him. Clark Kent's disguise is nothing more than a pair of glasses, but it fools everybody. Batman's lower half of his face is visible and people should also be able to deduce that being Batman would require a lot of wealth, in addition to recognizing that Robin is actually Bruce Wayne's ward since he only covers his eyes, etc.
Phaneron ★