I ask myself the same question all the time when i go to a laker game, why so many white people and Woman 
Neither i bet can dribble a basketball for more then 5 bounces
again,
one can watch basketball, baseball, soccer, football, rugby, athletics, figure skating (no homo), archery, darts, bungie jumping, lacrosse, mountain climbing, shotput, even WSM, wrestling, boxing, etc..... without being a participant or having ever played or performed that activity
however
IMO, bbing doesnt really fit into the category of the kind of activity one would go out of the way to watch, observe, get autographs, pics, etc, if one does not, nor has ever trained in their lives. Not that its a big deal, the more notoriety the better.
obviously friends and family are exceptions, otherwise it just appears odd. To me.
