I tried positive reinforcement when I adopted my two previous cats but it did not work. They were problem animals, their owner had harassed them so much (not intentionally, but doing stupid shit) they decided to piss and shit over everything.

Breaking them of that habit was brutal. I don't mention it because people flip out. But it was either stop them from anger pooping or put them down.

But it worked, and they both lived long and happy lives as well trained cats.

My current cat I let get away with too much, but his major transressions, like the few times he thought swiping at my face or hissing at me was a good idea, just get him timeout in the cage. He's a needy fucker so he hates that, he likes to be able to get to me at all times.