It's illegal in some Caribbean nations, for example, to wear camouflage, and cruise-ship passengers can be detained if found wearing the outlawed gear. Mexico has really strict rules about bringing in vapes, and violating those rules can result in short-term imprisonment.

Cruise lines are still stopping there and not warning some passengers .about serious violence and prison risks.

Crew members working at the exit will also be on the lookout, but the cruise lines can only go so far. Passengers should be prepared that the rules in any nation they visit might