Re: Do some cats poop/pee outside the litter box if they're mad?
If I leave Nito for too many hours, and then don't give him attention right away when I get home, he'll pee on the bed! Just like Mister, he does it while looking me right in the eye.
If the litter box isn't clean enough, he pees right outside it.
My mom's cat, Elfie, uses spraying to get what he wants. He knows that she'll throw him out if she sees him spraying, so he'll go and lift his tail and "threaten" to spray, which of course gets him just what he wants- he gets let out. I wouldn't call it "plotting" but I do think that cats have the ability to use a bit of logic.