More or less perfect union.

The debate over whether to unionize the news staff at WDAF-TV Kansas City, Mo., went public last week, to the chagrin of management and anchor Mike Thompson-whose internal memo opposing a union shop was made public.

Sources say Thompson's four-page paper caused enough internal friction that general manager Stan Knott said no further memos would be posted either for or against the union. To organizers from the American Federation of Radio & Television Artists (AFTRA), that decision to stop the debate after Thompson's statement was unfair and illegal. The station rescinded the policy following AFTRA complaints. Still more friction ensued, however, when someone from the …