I would simply, and I have done this, tell the manager, that you are not going to buy from their store until something is done by the company directly to the studio or Colbert personally, perhaps a statement by the Company in the news or on their online presence condemning his behavior, and that continuing behavior will necessitate removal of advertising dollars. Thank them for listening, and leave. They may blow you off, but if your serious, tell your neighbors, post it on Facebook to all your friends, and then stop shopping there.