I would not sing these songs in a folk club, sure. But I'm afraid the creation and performance of folk music has not confined itself to folk clubs, historically speaking. I might be tempted to go a litlle further, and suggest that no folk music has ever been created in a folk club. They are places for performance of certain kinds of folk material, but that is far as it goes.
    If drunken blokes, on their own, have tended in the past to sing songs of a certain crudity...well, this is another item in the Department of the Bleedin' Obvious. John Mehlberg collects them. Shock, horror.