What's the Evangelical take on the Natural Moral Law? Since it's not in the Bible, are Evangelicals taught to ignore or disapprove of the teachings of such folks as Aristotle and Plato?  Would they belive a redacted version of the Summa Theologica or City of God where all the Aristotelean and Neo Platonic stuff is gone and only the Divine Law stuff remains?
One of the founding ideas of Protestantism was "sola scriptura", meaning that we view the Bible as the only ultimate authority. That doesn't mean that we refuse to read any other books. The existence of thousands of Baptist bookstores should be adequate proof that that's not true. What it means is that we do not view any book other than the Bible as having any authority beyond the weight of the writer can convince us of by the force of his arguments.

Frankly, I suspect most rank-and-file Protestants don't know who Aquinas, Augustine, etc are. (Well, does the average Catholic know who they are?) Among the more intellectual Protestants, of course we read and quote and discuss Greek and Scholastic philosophers and the Church Fathers. We just read them with the attitude that we will agree with some things they say and disagree with others. We don't need "redacted" versions -- we're grown-ups, we can handle the fact that we may not agree with everything we read. :-)