By Daniel Kline The two cruise lines are using each other to end a beloved, main dining room practice. People don’t like change especially when the change in no way benefits them. If a cruise line switched coffee brands, for example, that would anger some people and delight others. If it decided that coffee — even the basic black kind — now comes with a surcharge, well, then everybody would be angry. One way to minimize that anger is for more than one cruise line to make the same change at the same time. If Carnival Cruise Line (CCL) – Get Free Report and Royal Caribbean (RCL) – Get Free Rep…