::The infobox field prints out "Religious stance". Our using "atheist" is only valid if we were talking about the existence of God or gods. In other articles they insert "Catholic", "Muslim" etc rather than "theist" or "monotheist". As far as I know the intent of the field isn't to measure belief in God or Gods but to show the ethical or moral basis of the person. For many this means simply inserting their Religion (though as we know with demographic studies that is a totally unreliable measure of anything). 
 ::With Dawkins the closest equivalent would be, for example Secular humanist but it certainly isn't "Atheist" any more than we would set the Religious stance of say a Pope to "Theist".