Actually paintball is pretty much a sport now theres are tones of paintball teams around the world that play against each other. You can actually make an income by playing and being good
http://en.wikipedia.org/wiki/National_Professional_Paintball_League
btw alot of adults play paintball, my friend who own the gym at where I work out he brings hes college fitness class to play outdoor paintball once per semester its also great cardio. And pony you should wear a ball cap since most mask dont cover the head area just in case you get one in the head.