People sometimes ask me if I like not having to care about anything. This question is absurd. Being a sociopath doesn't mean that you can do whatever you want with no consequences, e.g. to your world view, the way your mind works, your vision of your self, your tastes and appetites, to say nothing of all of the societal consequences. If I start killing people, it will change me. Even if I steal from someone, it will change me. Every time I do something I ask myself, what are all the ramifications of this? How will this effect me or my life? Do I even know how yet? Is this something that I want?
Imagine that you were raised in a strictly religious household that followed basic Judeo-Christian theories of morality. After you leave and denounce your god, on your way to the tattoo shop, do you stop by your enemy's house to kill him? No? But you no longer believe there is a god! Wasn't the only reason that you weren't killing because God told you not to? What about if you suddenly woke up without a conscience? Now you would start killing?
There are legitimate reasons why things are considered socially reprehensible, apart from them also being morally "wrong" -- not always, but frequently. Living by the rules is an easy way to make sure you don't have to face unintended consequences -- the same reason that people might not want to eat street food, or even food from an off-brand label, or buy their prescription drugs out of the back of a van for cheap. If you are willing to take risks for something, there is a lot to be gained by being a social arbitrageur, walking the untread path, making your own rules, etc. But understand that it will entail risks. And people are unsympathetic if your risk taking involved something considered morally wrong, like seducing somebody's wife, and you end up with a bullet in your head.