Just when you think the city of L.A. can't possibly get any more misguided about downtown development, along comes the latest "brainstorm": selling 9 million square feet of unused "air rights" above the Convention Center (that's enough space to build several 50-story-plus high-rises). The City Council apparently snuck in this little ditty last week with little, if any, discussion. Based on an LAT posting this afternoon, developers would be allowed to build projects significantly larger than codes now allow. But don't worry about additional traffic or growth limits because everybody will use mass transit, right? The new plan was introduced today to city officials and booster types, who might want to pick up on the fact that downtown is in overbuilding mode, even now. And that most everybody who lives downtown still drives. Who on earth is coming up with this stuff?