The devil made me do it is never a prudent approach. Agreed. But I think it is healthy and important to remember that Satan is ever-present in our lives. He exists in drugs, in the media, in technology, in pornography, in movies, in temptation, in so many places. Right now he is fighting a war with Our Lord and is doing quite well with internet pornography, meth, heroin, pre-marital sex, cohabitation, making marriage a thing of the past, aborting a child before it can even get a chance to breathe, in trying to blur the roles of sexuality, and he's pitting us all against each other culturally very well. Satan's motives and strategies must be considered, guarded-against, and taken seriously. Ultimately it is WE HUMAN BEINGS who take the bait and we are able to say NO to him. But like Sun Tzu says in "The Art of War," to know your enemy is to know yourself. Satan's most effective approach is to MIX LIES WITH THE TRUTH. It is my observation that most dangerous theology contains good intentions. I think women's ordination, not to beat a dead horse, is a good example. One can rationalize abortion with "hey, the kid will grow up in poverty and around drugs and gangs anyway" rather than try to make the streets safer and help mom out after delivery. One can rationalize internet pornography saying, "hey, pornography doesn't hurt anyone. Instead of raping an innocent woman, these sex-crazed men can make their perversion a solo activity in the safety of their home!" Cohabitation, which is a gross afront to God, can be rationalized, "hey, let's see if we're sexually compatible! Let's see if we get along? Better to make sure it works beforehand than to get into a marriage and get divorced!" Or with homosexuality, "hey, they're nice people and heck, our sins in our daily lives are probably worse than sodomy. If we're opposed to their sexual preferences, it's like slavery or racism! Let's fight for civil rights!"
Each time Satan takes our good nature, the desire to be prudent or cautious, caring, or afraid to step on toes, or our pragmatism, and he operates on that agenda to mix it with sins. And we buy into it. Most theological and ecclesiological sins and turf wars we're having in 2011 in Anglicanism and other communions are related to this aspect of mixing good intentions with evil IMHO.
And blaming Adam and Eve isn't great either. But it's important to reflect on the First Sin to put our salvation history together and have it be meaningful. Seeing how death entered into the world helps us to see the glory of how Our Lord smashed death right back. But dwelling on Adam and scapegoating him for our foolishness is a lame enterprise!