Imagine yourself reclined on a cruise ship, sipping piña coladas, and leisurely moving through the ocean to the next stop along your week-long journey. What could be more idyllic? Now, imagine the thick clouds of smoke, the swarms of tourists and all of the noise that cruise ships bring to port cities. That's the experience that a group of homeowners in Charleston, South Carolina associate with these gigantic ships docking in their quaint, historic downtown.    They don't want the city to expand its cruise terminal – at least not in the historic district, where some buildings date back to the 1700's.    But the City of Charleston is doing all it can to push back, saying that millions of dollars worth of tourist dollars are at stake. It's one issue that mirrors some of the complex problems that arise with an expanding cruise line industry. This debate has grown more traction in the wake of Carnival Cruise Lines' Triumph's on-board fire caught fire last week. Reporter Kim Severson, at our partner The New York Times, wrote about the growing pushback against the cruiseline industry in coastal cities around the country.   NoJay Williams  owns a home in Charleston's historic district.