Perhaps it's just curiousity as to why the rule exists, but if it's anything other than that I ask you this...
Why is dunking in warm-ups being illegal a problem? Dunking is not necessary, whether it's in pre-game or during the game, anyway. If the team needs to dunk to get pumped up, then that's a problem. And if the crowd needs the team to dunk to get pumped up... who cares? The game isn't about them.
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