It is unfortunate that all field operators don't enforce ballistic approved optics for their games, which should be the minimum safety requirement.
This is an adult sport, so let people make their own decisions.
If the use of goggles wasn't require, you betcha there will be people that won't wear any.
Watch this video. It shows that a DMR at 150ft can penetrate cardboard easily. I highly doubt the skin on your face is tougher.
A&K SR-25 DMR Sniper Rifle AEG - Product Demo Shooting - YouTube