Forrest- Why don't you share yours and your associates rule for the use of trees? Since I have the luxury of only guessing, I would assume most of the archies that designed, with an abundance of trees, never thought about trees as a strategic concept, more so as penal. They didn't use them for shot testing, they appear to have used them because they wanted to prevent something.
To me, there's a fundemental difference between the trees we are referring to as strategic, versus the Lon Hinkle tree, or the greg Norman tree at Kemper, which were planted to prevent certain shots.
Preventing is a negative influence, dictating a specific shot or creating the framing, is a positive one.
So, to answer your question, who said everything needs to have a rule, since some of the best creations break all the rules? If an archie wants to stifle the golfers creative ability, to negotiate the task at hand through the use of trees and only trees, that's a bad thing.
I know all you want me to do, is step into a big pile of shit, and I'm happy to oblige, as long as you can articulate where my observations have gone astray. If they are astray from the accepted norms, I would hope you try to understand my meaning. Me, being such a neophyte, I consider my remarks to be from the mouth of a babe.
What's your rule for tree usage?