I have been telling you this for YEARS, people! READ IT. Learn something.
"... when people study dialects in an objective, scientific way... they find that low-prestige dialects, such as African-American Vernacular English or Cockney English, have fully-formed grammar rules of their own that make just as much sense as any others. They are perfectly valid and functional forms of communication used by millions of people. The only difference is that they don’t have people running around telling everyone else to do it their way."
http://paintingthegreyarea.wordpress.com/2012/11/26/literacy-privilege/