while yes I am a fat ass, no I was not implying you were.
Chris is right, your spring is meant to flex. I dont have exact measurements but if lower it and think "cool I have .5" of clearance" you are going to hit and rub as soon as you hit a rough patch of road. I suppose you could but a stiffer spring? but this would make for a very uncomfortable ride. I am going to drop mine the 1.5 in. to see how it sits in the next few month most likely. I need to see if its going to work for my wife when I move up to a bigger bike. She's 4'11" 90ish lbs. So she feels your being small pain. lol