Warning. Rant ahead.

If there is one thing that really annoys me it's the saying "could care less", it's "couldn't care less". When will people realise that it makes no sense. Queen Chrysalis said it herself in the show and I was like oh come on. Even TheAmazingAtheist himself said that it makes no sense but even he still says it.

From what I understand it's an American thing. Do all Americans say it? no they don't, but quite a lot still do and it's something that always annoys me to no end. So what's your view on this? and why do you think people still use that term even though it's incorrect?