AFTER STUMBLING AROUND like D-League squads for the last two months of the regular season, all the NBA teams that tanked for lottery picks will finally gather in Brooklyn on June 26 ... and watch Cleveland select the player they really wanted. Which just goes to show, when it comes to the subject of tanking, supposedly sophisticated opinion has raced far ahead of actual facts. Many smart people insist noncontenders need to blow themselves to bits, hoard draftees and rebuild from scratch. But the numbers show that tanking doesn't work. And it's making too many games unwatchable.