Max Davidson eloquently took on Emma Thompson in an article in the Telegraph, "Emma Thompson's Attack on Slang; the Pedants Battle May Be Lost."
Read it here:
ET Attack

The take-off point in his article:
"Sblood, you starveling, you eel-skin, you dried neat's tongue, you bull's pizzle, you stock-fish, you tailor's yard, you sheath, you bow-case, you vile standing tuck...." A T-shirt given to Davidson by his teenage daughter.
".... if you want to know how to use good English, you should consult the master, not the sort of people who mark GCSE English papers, and certainly not Emma Thompson."
The teenage overdependence on slang infuriates her, she tells the Radio Times. "We have to re-invest in the idea of articulacy as a form of personal freedom and power."
Davidson agrees to some degree; "There is nothing more depressing than the grunts, monosyllables and unfinished sentences of the young."
But Davidson says "Creativity is as vital in language as in every other sphere of human existence." Some 100,000 words have been added to the OED over the last 20 years.
He discusses the word 'minging' (new to me, I'll let you find its meaning).
"Shakespeare could never have written his plays 300 years later. The sheer word exuberance of the Elizabethan era, when words of French, Latin and Anglo-Saxon were tossed cheerfully into the same pot, had given way to an age of hyper correctness, when grammar was king and pedants fulminated against split infinitives and sentences ending in prepositions.
"We are not quite as pedantic as the Victorians, but we share some of their vices........ We put too high a price on conformity."
....."I have never met Emma Thompson, but I suspect she is one of those sticklers for language who go to the lavatory and would cut her tongue out before going to the toilet...."
Australians go to the "dunny", .... "Australian slang, a wonderfully mazy tributary of the Queen's English, the product of a young, confident country not afraid to experiment with words." (Example, "fizgig", a police informer. "Brilliant".
He goes on to touch on U. S. urban slang; "vigorous and inventive, far more so than English slang, which has been strangled at birth by generations of schoolmasters".
For England, Davidson points at the novels of James Kelman and Irvine Welsh, "where the characters speak a language that bristles with vitality, unfettered by convention".