Sixteen would-be vacationers were banned from Carnival Cruises after a massive brawl in the Florida customs line on Monday. The knock-down, drag-out fight involved more than a dozen people of all genders throwing wild punches, sending stanchions and luggage flying at a customs checkpoint in Miami-Dade County, video on social media shows. No arrests were made or charges pressed, but 16 people ended up on Carnival’s no-sail list, the company told the outlet. “I’m about to skip the line,” one bystander quipped, watching the flurry of bodies and fists