Most areas of Palma are safe to wander around even after dark. Visitors should refrain from wandering alone after dark through the empty narrow streets of the Old Town and El Terreno. The gay and lesbian area of town, the Latter, can be rather sleazy in parts and known to attract drug users.
Remember Palma de Mallorca is full of club drugs. Extasy, cocaine, marijuana, and more can be found
especially in the club scene. Be cautious of drugs like GHB, ketamine, and others which can be slipped into drinks (especially in Sangría found in restaurants). Personal drug possession in Spain is legal (considered to be less than 500 doses), but trafficking is illegal.
Keep all valuables out of sign when sightseeing, such as wallets and purses to be kept in front or hidden in pockets. Any excess cash, cards, passports, and valuable documents are best left in the hotel or wherever visitor is staying to stay safe. It is always safe to take a taxi during late hours, especially if you are alone. Use your common sense to stay safe.