>_>; *unsure of how thoughtful I'm able to be, so I'll try to critique over here* *cough*
First off, I like the idea. The design itself is interesting, and I have to wonder more about it. What does it mean, and why exactly was it put there? However, the photo doesn't really do much more than present the questions. I think if something else was added to the picture, a spray can or a silhouette perhaps, maybe some of the questions could seem less open-ended.
The texture of the wall is something else that I like; you definitely captured the grit well enough. The placement of the graffiti is also good and interesting enough. Still, I can't help but feel like something is missing.