www.bansky.co.uk check this out, man

You shoudn't mess with the graffitti writers.
The longest recorded piece of graffitti was painted by a student in the toillets of his college in Changsha, china in 1915. It consisted in over 4000 characters critizisen his teachers and the state of the chinese society. After copleting his master piece the studented handed himself in and was paraded in front of the school and threatened with explusion. The student was a 22 years old chairman Mao Zedong. A graffiter who later founded the People's Republic of China and was responsable for the death of over 30 million People.