Commandments of Sarcasm - I

No matter how much thou art tempted to make it clear that thou art not being serious but merely sarcastic, thou shant use a ;) or 'lol' or 'rofl' or any other intended-to-show-amusement expressions at the end/start/midst of the said sarcasm. Rather thou shalt proceed with the flow even though the converser might think for time indefinite that thou art being serious.