Texas Hold'em and Halo are not physically demanding. However, Paintball is a Sport. Requires team work, physical exercise. How can you not classify it as a sport? That's dumb. And like saying Basketball is not a sport for no reason. Dhampy you are silly.
I personally don't think it should be, but there we are. It's like Chess being branded a sport.
1. competitive physical activity: an individual or group competitive activity involving physical exertion or skill, governed by rules, and sometimes engaged in professionally (often used in the plural)
Pretty much everywhere I am looking...it says it has something to do with physical activity.
There's professional paintball teams?
To me, for something to be considered a sport, there needs to be a successful professional league from which rules are governed. I.E.- the NFL, the NBA, major league baseball, the NHL, etc.
There is an official cup stacking governing body, too. Link