Time to release the inner nerd:
Cats, like many animals and humans actually, don't eat carrion. Decomposing flesh quickly becomes toxic to those who have not developed to eat it.
There are a few serious toxins that bacteria release but they take time to accumulate, and then there is the usually not as dangerous histamine which is not to be underestimated. While the dangerous toxins take a while (many days/weeks) to amass, histamine is in most bacteria, so with exponential growth of bacteria the ammount of histamine grows the same.
If you have ever eaten very large ammounts of smoked and cured products, sauerkraut/kimchi and similar things with high histamine you might have noticed an unpleasant effect it has on your digestion ... if that is a 1, carrion is dailing that to 11 .. and we humans are actually not nearly as sensitive to it as cats are (we usually have an enzyme to break up histamine in our guts, diamine oxidase, but it is quite limited so with enough histamine incoming you'll run out). So even if its not bad enough to have the highly dangerous toxins yet, a deceased body will quickly be unfit for consumption .. and cats instinctively avoid that at all cost, they need fresh meat (as any cat owner who had a cat complain about a half-day-old bowl of food will attest to)
So, you'd need a extremely fresh dead body and an already starving cat to even come close to the posibility for a cat to eat it's owner. And a healty cat can survive for over a week without food.
And ginger cats aren't evil ... just sometimes a bit .. special?
After that wall of text, here, have a bit of orange/ginger cat:
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