The NFL has been renamed the "No Fun League" for a reason. Instead of encouraging creativity in end zone celebrations, the NFL has over the years penalized players for any and all entertaining end zone shenanigans. Off the top of my head, several celebrations come to mind, including T.O.'s homage to the fastest man on the planet Usain Bolt, Santana Moss's assault on dirt, and Ocho Cinco's cameraman fun.
Fine. I understand wanting to promote sportsmanship. In the old days, nobody celebrated. They acted like they had scored before. That is a good mantra to teach young players.
Granted, the NBA celebrations are not done after scoring, like in the NFL. That just isn't possible given the lack of time outs after scores. In the NBA, the celebrations occur after a time out is called, or during the pregame. But the creativity we have seen lately in the NBA is just like that in the NFL. I just hope the NBA rule makers embrace this new form of game entertainment.