@ claig
Hmm, at the risk of sticking my nose into a debate which is getting along nicely without me... I don't agree with you about Boyle et al being 'liberal' in their use of swearwords.
I actually see Boyle as deeply, reactionarily conservative in that way because he relies on the inherent shock value of a word like 'cunt' in order to be funny (well, 'funny'...). He relies on there being a taboo, iyswim. His comedy really shores up taboos and divisions, imo.
Also, whilst I agree that no one individual can change the language, we can individually make conscious choices about how we regard the language and use it. To my understanding, the word 'cunt' originally applies to female genitalia, and is a direct and powerful way of referring to them. It is much less offensive than 'vagina', which, as someone else pointed out, is Latin for 'sheath for a sword'.
I find 'vagina' offensive, and find it offensive that that is the medically approved term. It is also notable that many slang words for female genitalia are similarly offensive in and of themselves: gash, wound, etc. They all imply either that women's genitalia are inherently dysfunctional or that they exist primarily in relation to/ service of men.
Whereas 'cunt', I think, does not. It simply refers to the anatomical thing itself. Er, is that making any sense...?
Therefore, when people misappropriate it to refer to people and not anatomical structures, and make it 'the worst word ever, for the most obnoxious people ever', that is offensive, imo, as it takes what ought to be a direct, even celebratory referent for an important part of women's bodies and turns it into a deadly insult, a word we can't all use freely without taint.
That is where the real offense lies, for me.