The reason Chesty that Atheists and those who have no religion seem not to go out and do what ever they want is because we have but one life to live.
Morals doesnt come from religion, if it did than you have to explain all the bad that came from religion as well.
We can't do what ever we want because of this one life. if we do than we just wasted it. Now i dont speak for everyone, because there are surely people on both sides of the spectrum who do waste this only life they have.
But not believing in god/religion does not lead to total anarchy.

__________________
"For every man there is a purpose he sets up in his life, let yours be the doing of all good deeds." - Qur'an
Give every man your ear, but few thy voice. Take each man's censure, but reserve thy judgment.[Hamlet] -Shakespeare, William
Where there is doubt, there is freedom -Latin Proverb