I have a tough decision to make, very soon. In the face of a powerful lobby that has clearly gained credibility with a critical constituency, I must choose a potentially counter strategy. In something other than Washington-ese, that means that I have to tell my 9-year-old son that the latest Star Wars movie is too violent for him to see, even if every fast-food franchise and every other television commercial is urging him not to miss it. Given my personal affection for the previous five Star Wars movies (even the eye-crossingly dull “Episode II”), I am sorry to find myself...