Although crime is not as prevalent on St. John as it is on St. Thomas and St. Croix, it does exist. Keep your hotel or vacation villa door locked at all times, even during the day if you are, say, out by the pool. Stick to well-lighted streets at night, and use the same kind of street sense that you would in any unfamiliar territory. It's not a good idea to walk around Cruz Bay late at night. If you don't have a car, plan on taking a taxi, which you should arrange in advance.