Let's get this straight from the outset: I do not condone graffiti. Because of my love of architecture, I have great difficulty in understanding why someone would want to mark it up. On the other hand, some of the images contained in graffiti are interesting, and they are, by their nature (and the good sense of those who take them down) ever so temporary. So it is with the understanding of this inner-turmoil that I present to you a smattering Boston graffiti (Banksy it is not).
Also, I should note that if either of these pieces have a specific social message to them, I am unaware of it.