Ko Chang, can be considered moderately safe after dark. While the island is generally secure, some areas can become somewhat risky due to decreased visibility and quiet streets. The local population is amicable towards tourists, but like in any location, potential risks still exist. Crimes like theft, pickpocketing, or other forms of scams may occur. It is always recommended to stay alert, avoid deserted or poorly lit areas, and opting for a taxi or a group bike ride is safer than walking alone. Having a companion or staying close to areas populated with other tourists can also increase personal safety.