Here's a defensive, however, legal racking trick if want to stop the wing ball from going in.Depending on what side your opponent is breaking from:
Turn the wing ball and the ball its touching (from the second last row from the back)so that the round circled number labels on the balls are touching/frozen to each other.
Something to do with the composistion (friction) of the numerical labeling will cause the balls to react differently and steer the wing ball away from the pocket.
Got that secret from a Pat Flemming instructional DVD,however, never really tried it(thought it was sleazy

) to see if it works.
Example:
1
46
789
23
5
Turn and freeze the darkened black balls numerical labels together.Give it a try and let me know if it works.Maybe I'll use it when playing some unlikeable goof.
RJ