Yeah, General, no offense bud but you're definitely stereotyping people to a different level than what society is. Now if you live in a shoebox in the streets of LA, sure, what you said may apply.
Since my girlfriend and I broke up I've been dating a few other girls here and there, and the one I've most recently been seeing is into tattoos. I never, ever, ever would of guessed. Nicest person I've ever met, always complimenting people. She seriously can't talk to someone without saying something nice about their house/car/hair/shirt/whatever. She's not hardcore about them, but definitely likes them and has one.
Then at work there was a lady who's probably got about 80 piercings and majority of her body is covered in tattoos. One day I got to sit down and talk with her on lunch break, and I was amazed at how down to earth she was.
In short: There is no affiliation between people and tattoos. Judging people by their tattoos is no different than being racist towards a certain race. <---FACT.