I tend to not get into pissing matches here, because quite frankly, its stupid... but i tend to agree that full cages are a safer bet. So does actual scientific research.....
http://bjsm.bmj.com/content/36/1/27.abstract?sid=374eeb4f-6553-46eb-9e3e-6427e15b6a6a
Im an optometrist, there is a study that shows vision to not be significantly affected by full cages vs visors, though i can't find a link right now.
By mandating half shields in youth hockey in Canada, 10Mil per year was saved in healthcare costs in the early 90's.
I tend to let science help me make decisions,
but hey maybe im just a 'pussy'.