Your very first link includes the following quote: "American regional dialects allow freer adjectival use of certain past participles of verbs than does Standard English." It's not standard English. It's a common regional misuse of standard English. The word "ain't" is also in the dictionary as non-standard english, but anyone using that word also sounds idiotic. Don't use the word. It makes you look ignorant, and I dont think you are ignorant.
BTW You are owned