Community improvement districts turn public taxing authority over to private businesses. They create a confusing array of sales-tax rates within the city limits. And their jacked-up tax rates can last 22 years, long after the elected officials who approved them are gone. Given all that's wrong with community improvement districts as designed by the 2009 Legislature, perhaps it was too much to expect the Wichita City Council to make things right with appropriate signs, our editorial today argues. Still, the sign design that won unanimous council approval Tuesday was a disappointment. The sign will be visible enough — at least 24 square inches. But it will constitute the bare minimum in public disclosure.