not all vandals are sore in the eyes. but one question i suggest is this.
would you consider a beatifully crafted/painted art work or graffitti to show or share their thoughts put on a public property by nuisance people or protesters vandalism?
2. should we prosecute activist vandals or a an artist vandals as ïllêgâl eventhough what they did is a form of expression which is guaranteed and protected by our constitution and the united nations declaration of human rights?
3. how can you differentiate street vandalism from street art?
hope this can help.. if you can give me the problem of your reasearch maybe i can share more questions related to your main problem so you can dispute or accept your hypo or assumptions.