Shakespeare most of all.. There are some immensely foul (and fair?) concepts and language there. Who cares that modern audiences miss may of the connotations, it's still filthy.
Hamlet wrote:
Hamlet: Lady, shall I lie in your lap?
Ophelia: No, my lord.
Hamlet: I mean, my head upon your lap?
Ophelia: Ay, my lord.
Hamlet: Do you think I meant country matters?
Macbeth wrote:
For brave Macbeth (well he deserves that name)
Disdaining Fortune, with his brandish'd steel,
Which smoked with bloody execution,
Like valour's minion,
ooh... he said bloody...
and leave not simply Hamlet no.... what about the filth that is Jane Austen
Emma wrote:
ut scarcely had she begun, scarcely had they passed the sweep-gate and joined the other carriage, than she found her subject cut up - her hand seized - her attention demanded, and Mr. Elton actually making violent love to her .
I'm not even going to quote 'Mansfield Park' when Edmund ejaculated in Fanny's ear - how filthy.
Yep... If you're going to tax censorship - lets start with the classics.