About a third of atheists (32%) say they look primarily to science for guidance on questions of right and wrong, up from 20% in 2007.
I'm sure this is true; atheists like to swagger about pretending that "reason" or "science" answers all questions. But "science," per se, has nothing to say about right and wrong. The usual default position of atheists is moral relativism, with an understanding of "right" and "wrong" as merely culturally determined. As a practical matter, atheist ethics seem to boil down mostly to rationalization of personal desires.
That’s why they are part of the faith based religion of evolution. Evolution gives them the hope that they can escape judgment...so as you say they can do as they please without consequences.