I watched a few minutes of Lockdown last night and very few of the inmates at Folsom had Nana and their mother's name tattooed on their skulls, necks, or forearms. I don't know that Martin's tattoos are dispositive on the wanna-be thug question; maybe another brick in the wall with the pitbull, Twitter name, content of Tweets, graffiti on lockers, marijuana pipe and bag, stolen women's jewelry, 'burglary tool,' etc.
I’m not so big on the tattoo angle. I have six and the worst I do is play poker, and have a few beers with friends occasionally.