Great essay Frank! It made me laugh and think at the same time!
However, I think your theory about language and how to "remove" dirty language is a little bit static.
When I read old books, I some times miss out on the cursing, because I simply do not understand that it can be considered dirty. Even my parents cursing seems to me as being a quasi-dirty; more funny than dirty.
Eg: In Shakespeare's "Othello", the main character with the same name as the title of the work, is described as being a "Moor". Not until the second act did I understand that this had racial undertones.
The element of immigration and/or foreign influence may change cursing radically in just a few years. At least were I live, English has influenced the language so much, that many children say the F-word just as in the original language.
I don't think adults in general are much offended by it, as it holds no intimate meaning to them, but it is a strong expression among teenagers.
So I think we are already ignoring a lot of bad language without being aware of it.
Moreover, I don't think you can simply ignore statements which involves family members. "Your Mother..."-kind of dirty language has hit my home country pretty hard, and I think even adults are offended by that.
at least once in every sentence. During his performance review he was dinged for his offensive language. He was quite angry about it and ranted around shouting, "What the f**k are they talking about? I don't f**king swear!" We laughed and tried to suggest he listen to himself. 
It does seem kinda ridiculous. What is so bad about sex and feces, anyways? lol
