Corey,
Do rows of midget evergreens dividing holes really protect golfers? Larger hardwoods may help, but aren't golfers just as susceptible to the ricochet? The point being that there is a false sense of security associated with trees, which separate holes.
A good argument is that open, unobstructed site-lines can create a visual awareness or consciousness between groups, where golfers can easily be spotted, judge when to hit and not to hit, and forewarn others of an errant shot. Normally, golfers can't always forewarn neighboring groups of an impending shot when they are obscured by trees and therefore cannot be seen.
Just an argument that, in so far as I know, has not held up in courts, in the brief case history that I've read.