After reading some of Allen's well-thought-out stuff (much of it from Penny Tupy), I don't necessarily have a problem with a betrayed spouse moving out SO LONG AS IT'S NOT AT THE REQUEST (OR DEMAND) OF THE CHEATING SPOUSE. He's written some good posts about the strong emotional statement that can be made by removing yourself, your kids, and both yours and your kids's belongings from the marital home, and leaving the cheating spous there in a quiet, half-empty house, all to themselves.
But other than that very specific tactic, I would advise against it.
