while i understand the concern..it's less of an issue then say..the open sides of shooting glasses that are used at some venues..in 10+ years of doing this i have yet to actually see anything get through mesh to injure someone.for the most part mesh is all that is used in asia,where their fps limits make you guys's limits look anemic..i've seen at least 20 people in that same time injured because of fogged eye pro,including serveral permanently wrecked knees and shoulders,broken arms ,legs and hands and even a branch driven through the middle of a player's hand in a fall....
in the end it boils down to the people you play with and how you play...and what level of risk you are willing to take to have fun...