The ultimate question into this debate is who decides what is right or wrong? This has much to do with social standing, much of the "condemned" language comes from social groups other than the educated middle classes--professional people (Finegan, 1980). Take the pronunciation of r for example, Janet Holmes expresses that even though there is nothing good or bad about r-pronouncing, in more middle-class communities it is regarded as humorous and evident of lack of education and in others is deemed good speech (Holmes, 2004). Although a standard language is useful in terms of print and literature, it is not right to say that the language of middle-class speakers is not better than the language of other social groups. Language references such as dictionaries are an example of language and should simply be referenced, not all social situations require a formal way of speaking and vice versa. Language is an expression of character and defines a person. You can gain great insight into an individual from their use of language and should not be frowned upon because they aren't using RP but instead this uniqueness should be celebrated. Ultimately, there isn't such a thing as a "wrong" language just a different way of using it.