Photo credit goes to Kevin Montreuil. One of the federal buildings in the Tenderloin is thoughtlessly tagged with some thoughtful graffiti. According to livinintheloin: I live right on UN Plaza, so my walk to the BART hole is a short one...[t]his morning as I round my building, I noticed the smell of urine, and something else. I don’t actually LOL that often, but today I did. The door on the side of the building......