You just do it. You can identify yourself with a style, which is what makes this artform so amazing. Everyone who does it brings something new to it. If you are going out to tag, make sure you don't...
Googling "graffiti arrests" returns nearly half a million hits. "Felony graffiti" (graffiti that costs more than $500 to clean up) returns nearly 200,000 hits. It is definitely illegal; the charge is...