I think you should remove the photos that have graffiti on them. I personally would be very offended if someone (people I don't know) did that to a picture of mine. You know, just imagine she went out on a limb and posted her picture for the whole world to see, and first thing she gets is a bunch of assholes defacing her face (literally). Don't you think that it might be a bit embarrassing?
Is this what we do to new users???
