Leeds born artist Marcus Harvey is best known for his large work depicting Moors murderer Myra Hindley, formed from white, grey and black stenciled handprints of children. This work was the centre of major controversy when it was installed at the 1997 Sensation exhibition.
The reaction to the work raised questions about the censorship of art and the legitimacy of using such controversial imagery. The painting had to be placed behind protective acrylic glass after it was attacked with ink and eggs by protestors.
contemporaryartetc.com 
Surely this is just art for controversy sake; it is the art equivalent of those posters of yoda being made up of lots of pictures of yoda in the start wars movies.
it was no great surprise to hear that this controversial painting was attacked by protestors, however what is surprising, is that the two seperate acts of vadalism where infact both by praticing artists.