We LOVE preempts---when it's US doing them! As opponents, we HATE them, because they do their job. They eat acres of bidding space, cause communication problems, and generally gum up the works.
Today (and later this month) we'll look at when and how to fight back. The central concept is that the preemptor is WEAK and is trying to steal from us. That does NOT make us happy. Ready to retaliate?