Heh, nope, it's among the rule changes the NBA is considering.
Edit explaination for non NBAphiles: In the current rules, you MUST play man on man defense. You can double team the ball handler, but unless you're going after the ball handler you must cover a specific man and with no help. (Zones, shifting defenses typical to what gets called for illegal defense)
[This message has been edited by Fatty (edited 04-01-2001).]