David William Noll may face 5 years in prison for vandalizing two Banksy pieces in Los Angeles. The irony in this is just too much, similar to the artist who broke one of Ai Wei Wei's vases at a show that depicted Wei himself breaking a vase.
At the end of the day, you do have to question both sides for their actions. First, why would Noll post video of himself on Youtube committing the act. Secondly, why would you charge someone for vandalizing vandalism? Unless of course this is completely just press fodder and the reality of the situation is that Noll is being charged for graffiti itself.