I read a british blog and apparently there is a problem there where some speak the british version of ebonics.
Poor parenting is global.
Anyone who thinks that speaking like a criminal will impress shareholders or investors, let alone any company's paying clientelle is not only a fool but a continual risk to anyone who associates with them.
I may accept someone who comes up to Me on the streets and greets Me informally in such a manner, but in a business or legal environment no bloody way. I will find someone else with demonstrably better intelligence to deal with.
Is that different from Cockney?