Ethical sociopaths?

Can sociopaths be ethical? A certain type of ethical, certainly. But before we talk about potential sociopathic limitations, this NY Times article ("In Life and Business Learning to be Ethical") about the issues with ethics that almost all of humanity shares:

The problem, research shows, is that how we think we’re going to act when faced with a moral decision and how we really do act are often vastly different.

Here’s just one of many examples from an experiment at Northeastern University: Subjects were told they should flip a coin to see who should do certain tasks. One task is long and laborious; the other is short and fun.

The participant flips the coin in private (though secretly watched by video cameras), said David DeSteno, a professor of psychology at Northeastern who conducted the experiment. Only 10 percent of them did it honestly. The others didn’t flip at all, or kept flipping until the coin came up the way they wanted.
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[W]e need to be more aware of the ways we fool ourselves. We have to learn how to avoid subconsciously turning our backs when faced with a moral dilemma. And then we must be taught how to challenge people appropriately in those situations.

“When people predict how they’re going to act in a given situation, the ‘should’ self dominates — we should be fair, we should be generous, we should assert our values,” said Ann E. Tenbrunsel, a professor of business ethics at the University of Notre Dame who is involved in the EthicalSystems website. “But when the time for action comes, the ‘want’ self dominates” — I don’t want to look like a fool, I don’t want to be punished.

“Our survival instinct is to want to be liked and to be included,” said Brooke Deterline, chief executive of Courageous Leadership, a consulting firm that offers workshops and programs on dealing with ethical situations. “We don’t willfully do bad things, but when we’re under threat our initial instinct is to downplay or ignore problematic situations.”

Sociopaths may not have the same set of ethics (or issues implementing ethics -- our survival instinct is not so much to be liked and included), but it's also possible for sociopaths to have a personal preference about how they wish to act, even if it is just a personal aesthetic as opposed to be a moral code. Webster defines ethics as many things, including "a guiding philosophy". Maybe for sociopaths that would look something more like utilitarianism or "the diamond rule", as opposed to a saint's altruism and golden rule, but even criminals have codes.

At the heart of any choice to ascribe to a set of ethics, whether empath or sociopath, is a belief that your choices matter -- that you and others around you are affected by everything you choose to do. You don't have to believe in right and wrong to understand that you are what you eat. And I wouldn't want life any other way. What would be the point of making choices if they didn't matter? And if you believe your choices matter, it's only natural to ascribe to some sort of "guiding philosophy" about how to make those choices. So yes, sociopaths can and are ethical. Could sociopaths ever be considered more ethical than empaths?