This thread is brilliant, I love it.
Mine are -
Do NOT poo in the bath. It is not hilarious.
Do NOT try and stick your finger in the cats bum. She does not like it.
Do NOT pull the cats tail. She will scratch you.
Do NOT take a sanitary towel out of my handbag and tell grandad that you have got a lovely present for him. 
All drawing is to be done on paper, NOT the table, sofa, walls, TV, or my face.
DVDs are NOT frisbees