Well, it would have been obvious to Beth or any native speaker that I misused 'don't' on that occasion on purpose. We do that sort of thing from time to time but you have to be a native speaker to get away with it. [edited]

Haha! I don't know why I was edited. A 'cockney' is a Londoner, Londoner wot is born within the sound of Bow Bells. Turnoi has said more than once that other westerners when he speaks could swear he's a cockney- from London. It is often fashionable among the upper classes in UK to make certain mistakes (small talk) This is often done to put emphasis on something you want to get across. He should know that. You can't attempt it if you are a none-native speaker.