tagging =/= graffiti.
most people who tag think they are graffiti artists, but every graffiti artist knows the difference.
i, for one, know that i just throw cool looking words on the walls of bus stations and bathrooms with a fat chisel-tip sharpie. some call it graffiti, but i call it tagging.
i just asked for people to post shit they put on walls, whether it's a tag or a graff, i don't care.