I don't think Wilco was far off base, if at all. Teachers have a distinct advantage in the "molding minds" department, especially at this age, and other than providing a safe, free, loving, nurturing environment, should not go about "molding" opinions. I've seen too many bullies (teachers) try to control what children think, and IMO it's immoral, regardless of the motives. I don't think anyone has the right to control another person. Taking advantage of the teacher/student relationship in this way is wrong.

Back to songs...the children can tell you the ideas they want to express. It may be lonliness, fear, heartache, anger, or even the need to be silly and laugh. They may want to sing Kumbaya because it sounds pretty and expresses an emotion they have no words for. We as adults or teachers have no right to judge the appropriateness of a child's feelings, especially when they are confused and hurting.

Just my 0.02.